halongbaycruise.infoIndependent cruise guide, Vietnam

storm cancellations

Halong Bay cruise canceled by a storm: what you get back

When a storm gets a Halong Bay cruise canceled, the order comes from the Quang Ninh Inland Waterway Port Authority, which stops departure permits until the final storm bulletin. What happens to your money is not in that order. It is in the terms of the listing you booked, and each listing states its own.

Most Halong Bay cruise listings on GetYourGuide, Viator and Klook offer free cancellation until a set time before the start. That window is your decision point: a storm forecast before it closes means you can still cancel for a full refund on the listing's own terms. After it closes, or on a non-refundable fare, the listing names no refund for a storm stop.

No booking site has better terms across the board: terms differ listing by listing, even on the same site. The table below sets them side by side, so you can see whether a Halong Bay cruise you are looking at can be canceled when the forecast turns.

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Ha Long International Cruise Port (Bai Chay)
The Bai Chay cruise pier with a large cruise ship and tour boats alongside, from the cable car.Photo: Jakub Hałun / Wikimedia Commons, CC BY 4.0

as each listing states them

Cancellation terms by booking site

Every cruise in this guide, grouped by the site that sells it and by its cancellation line, with what that line leaves you when the port authority stops the boats. Filter by booking site; the rules that apply to every cruise sit beside the table.

Showing every booking site.

Cancellation terms of Halong Bay, Lan Ha Bay and Bai Tu Long Bay cruises, by booking siteEach line is copied from the listing, as listed on 14 November 2026. Listings with the same terms share a line.
Booking siteTerms, as listedIf a storm stops the cruiseCruises with these terms
GetYourGuide Free cancellation windowFree cancellation up to 24 hours before start for a full refund (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
Show 21 more cruises
  • Hanoi: 2-Day 1-Night Lan Ha Bay Cruise with Meals & Activities1 night
  • Hanoi: Halong Bay to Lan Ha Bay and Cat Ba Island Day TourDay
  • Hanoi/Cat Ba: Beka Day Boat, Lan Ha Bay Full-Day Boat TourDay
  • Hanoi/Cat Ba: Lan Ha Bay Day CruiseDay
  • Hanoi: 2-Day 1-Night Lan Ha & Halong Bay Cruise w/Balcony1 night
  • Hanoi: 2-Day 1-Night Halong and Lan Ha Bay Cruise with Kayaking1 night
  • Lan Ha Bay Full-Day Cruise and Kayak (small group)Day
  • Hanoi/Ninh Binh: 2-Day 1-Night Halong & Bai Tu Long Bay Cruise1 night
  • Cat Ba Island: Lan Ha Bay Full-Day with Luxury CruiseDay
  • Lan Ha Bay Cruise with private balcony: biking, kayaking, meals1 night
  • Hanoi/Cat Ba: Lan Ha Bay Day Cruise with Dark and Bright CavesDay
  • 2-Day 1-Night Cruise: Visit Bai Tu Long Bay1 night
  • Renea Cruises: Small Boat in Bai Tu Long & Halong Bay1 night
  • Day Cruise to Discover Bai Tu Long BayDay
  • From Hanoi: 3-Day 2-Night Lan Ha & Halong Bay Amour Cruise2 nights
  • Hanoi: 2-Day 1-Night Lan Ha & Halong Bay Cruise with Balcony from Tuan Chau1 night
  • Halong Bay: Day Cruise from Halong Port Shore ExcursionDay
  • Explore Halong Bay on a 4-Hour Scenic Cruise with Kayaking and a Cave VisitDay
  • 2-Day 1-Night Halong Bay Cruise with Meals, Activities, and Transfers1 night
  • Hanoi: 2D1N Lan Ha Bay Cruise and Cat Ba Island Adventure (hotel night on Cat Ba)Hotel night
  • Lan Ha Bay: Luxury Cruise 2 Days 1 Night1 night
Viator Free cancellation windowFree cancellation up to 24 hours before the experience for a full refund (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
Show 10 more cruises
  • 2-Day 1-Night Luxury Halong & Lan Ha Bay Aspira Cruise from Hanoi1 night
  • Lan Ha Bay Full-Day Tour from Hanoi, Hai Phong: Serenity CruisesDay
  • Best Seller Halong Bay Day CruiseDay
  • Halong Bay 2 Days 1 Night Cruise1 night
  • Halong Bay and Lan Ha Bay Luxury Day Cruise by The Halong CatamaranDay
  • Bai Tu Long Bay 2 Day 1 Night Cruise1 night
  • 2 Days 1 Night Lan Ha Bay AdventureHotel night
  • Halong Bay and Lan Ha Bay Luxury Day Cruise from the HarbourDay
  • Catamaran Day Cruise Halong & Lan Ha BayDay
  • Halong Shore Excursion: Half Day Cruise at Halong BayDay
Viator Free cancellation windowFree cancellation up to 6 days before the experience for a full refund (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • All inclusive Bhaya Classic cruise 2-Day 1-Night Halong Bay Tour1 night
  • Overnight Halong Bay Cruise on the Starlight1 night
Viator Non-refundableNon-refundable and cannot be changed for any reason (as listed) The listing states no refund and no change for any reason, so a storm stop is not named as an exception.
  • Luxury Halong Bay Cruise Full Day from Hanoi or HalongDay
  • 3-Day 2-Night Bai Tu Long Bay & Halong Bay Journey with Swan Cruises2 nights
Klook Free cancellation windowFree cancellation 24 hours before (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • Halong Bay Day Tour with Sung Sot and Ti Top by Cozy Bay CruiseDay
  • Diamond Era Luxury Day Cruise: Halong Bay, Sung Sot, Ti TopDay
  • Sunlight Grand Day Cruise: Halong Bay, Sung Sot and Ti Top IslandDay
  • Dolphin Day Cruise: Halong, Sung Sot, Ti Top with Luxury TransferDay
Klook Free cancellation windowFree cancellation 24 hours before the activity date (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • Jewels of the Bay Day Cruise: Halong Bay with Sung Sot and Ti TopDay
Klook Free cancellation windowFree cancellation 72 hours before the activity date (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • La Pandora Boutique 2D1N Cruise: Halong Bay & Lan Ha Bay Tour1 night
Klook Free cancellation windowFree cancellation 14 days before the activity date (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • La Regina Classic 2D1N Cruise: Halong Bay & Bai Tu Long Tour1 night
  • Lan Ha Bay & Cat Ba Island by Sunlight Premium Cruise1 night
Klook Free cancellation windowFree cancellation 48 hours before the activity date (as listed) You can cancel for a full refund until the window closes, as the listing states. After it closes the listing names no refund for a storm stop: ask the seller what it does when the port authority stops departures.
  • Victorious 2D1N Luxury Cruise: Halong Bay with Sung Sot & Ti Top1 night
Klook No cancellation, weather clauseListed as no cancellation; operator may cancel for extreme weather (as listed) You cannot cancel; the operator may cancel for extreme weather. The listing does not say what you get back when it does.
TourRadar Terms not on the pageCancellation terms not shown on the listing page The tour page does not print the terms; they sit behind a link. Open them before you pay.

What the rules say beside the terms

Who stops the boats
On Halong Bay and Bai Tu Long Bay the Quang Ninh Inland Waterway Port Authority stops departure permits; a notice runs until the final bulletin on the storm or depression. On the Cat Ba bays the port authority or the Cat Ba Bays Management Board orders boats back, and the captain must comply.
Ending a cruise early
On the Cat Ba bays, Hai Phong Decision 253/2025 says ending a cruise earlier than contracted needs the written consent of the guests' representative.
The license deposit
A domestic tour operator holds VND 100,000,000 in a bank for its license (Decree 168/2017). It is not a fund that refunds canceled cruises.
Where to ask first
For refunds or changes, the UK FCDO advises travelers to contact their travel provider first.

who decides what

From storm bulletin to your refund

  1. The forecast

    Vietnam's weather service issues storm bulletins. The stop notices name no wind speed; they run from a stated hour until the final bulletin on the storm or tropical depression.

  2. The stop

    On Halong Bay and Bai Tu Long Bay the port authority refuses departure permits; under Quang Ninh Decision 43/2024 the permit rests with the Inland Waterway Port Authority (Cảng vụ). On the Cat Ba bays, Hai Phong's port authority applies Decision 253/2025.

  3. On the water

    A boat already out is brought to shelter: the captain tells passengers and moves the boat when the weather turns unsafe. Overnight anchorages are set by the Ha Long Bay Management Board (Halong Bay) or the Bai Tu Long National Park Management Board (Bai Tu Long Bay).

  4. Your money

    The stop says nothing about refunds. The operator or booking site decides, under the terms in the listing you accepted. Those terms are in the table above.

The Ha Long Bay Management Board posted 7 notices of storm or tropical depression stops between June 2025 and November 2026. Each one, with its start, its end and the notice behind it, is in the Halong Bay cruise suspension log.

when to cancel yourself

The free-cancellation window is your decision point

A listing with free cancellation lets you cancel for a full refund until the window closes. On the Hanoi: 2-Day 1-Night Halong, Lan Ha Bay Cruise with Balcony the line reads: Free cancellation up to 24 hours before start for a full refund (as listed). On Viator's Halong Bay Overnight Cruise All Inclusive 2 Days: Free cancellation up to 24 hours before the experience for a full refund (as listed).

Windows differ even on one site. On Viator, one overnight Halong Bay listing reads: Free cancellation up to 6 days before the experience for a full refund (as listed). Klook's overnight listings run longer than its day cruises; one Bai Tu Long Bay overnight reads: Free cancellation 14 days before the activity date (as listed).

So in the storm months, read the window against the forecast. If a storm is named for your dates before the window closes, you choose: cancel now on the listing's terms, or wait for the port authority's decision and accept what the seller then offers. Once the window has closed, the choice is no longer yours.

Fares with no window

Some listings sell without one. A Viator Bai Tu Long Bay journey (3 days 2 nights, 2 nights on board) reads: Non-refundable and cannot be changed for any reason (as listed). A Viator full-day Halong Bay tour carries the same line: Non-refundable and cannot be changed for any reason (as listed).

On Klook, the Azura 2D1N Luxury Cruise: Halong Bay & Lan Ha Bay Tour listing reads: Listed as no cancellation; operator may cancel for extreme weather (as listed). A weather clause like this lets the operator cancel; it does not say what you get back.

Halong Bay in mist or fog
Two tour boats on flat water with karst islands fading into winter haze.Photo: mmmmngai@rogers.com / Wikimedia Commons, CC BY-SA 2.0

side by side

Four Halong Bay cruises, four kinds of terms

The same storm can end four ways, depending on the listing. Three cards below carry their terms with their price and read date; the fourth, on Klook, has no price on its page.

  1. HLB 1 night

    GetYourGuide, Halong Bay Lux Cruises - Marvel Travel

    Hanoi: 2-Day 1-Night Halong, Lan Ha Bay Cruise with Balcony

    Bay unknown: bay, route and pier not stated in the listing; ask the seller which bay it sails.

    • 2 days 1 night, 1 night on board
    • Bay fee not named in the inclusions; the fee depends on a route the listing does not state
    • Hanoi transfer not in the price
    • Free cancellation up to 24 hours before start for a full refund (as listed)

    from US$126 per person for the lowest option on the listing, as listed on 14 November 2026

    From Hanoi, before the bay fee: VND 3,870,000 (about US$151) plus a bay fee of VND 400,000 or more per adult

    4.8 from 6,298 reviews

    Check dates: 2-Day 1-Night Halong, Lan Ha Bay Cruise

  2. 1 night

    Viator, Halong Bay Cruise Hunters

    Halong Bay Overnight Cruise All Inclusive 2 Days

    Bay unknown: bay, route and pier not stated in the listing; ask the seller which bay it sails.

    • 2 days 1 night, 1 night on board
    • Bay fee in the price
    • Hanoi transfer not named as included
    • Kayak or bamboo boat listed
    • Free cancellation up to 24 hours before the experience for a full refund (as listed)

    from US$44.85 per person for the lowest option on the listing, as listed on 14 November 2026

    All in from Hanoi: VND 1,760,000 (about US$68)

    4.7 from 3,560 reviews

    Check dates: Halong Bay Overnight Cruise All Inclusive 2 Days

  3. HLB 2 nights

    TourRadar, Halong Bay Lux Cruises Tours

    Halong - Lan Ha Bay 3 Day 2 Night Cruise & Private Balcony Cabin

    Sails: Connecting itinerary from Halong Bay into Lan Ha Bay, sailed since 20 April 2026; route code not stated in the listing. Pier: Hanoi Old Quarter pickup (bus).

    • 3 days 2 nights, 2 nights on board
    • Bay fee not named in the inclusions; the fee depends on a route the listing does not state
    • Old Quarter pickup and drop-off are in the itinerary, but the listing puts transport under not included: confirm with the operator
    • Kayak or bamboo boat listed
    • Cancellation terms not shown on the listing page

    US$320 per person, as listed on 14 November 2026

    From Hanoi, before the bay fee: VND 8,810,000 (about US$344) plus a bay fee of VND 600,000 or more per adult

    5.0 from 74 reviews

    Check dates: Halong - Lan Ha Bay 3 Day 2

The two-night Lan Ha Bay balcony cruise on TourRadar does not print its cancellation terms on the tour page; the policy sits behind a link. Open it before you pay, and look for what the seller does when the port authority stops departures. On Klook, the Azura listing states no cancellation by you, with a weather clause for the operator. Prices for every cruise, with the bay fee and the transfer, are on Halong Bay cruise prices.

mid-cruise

If the stop comes while you are on board

Halong Bay and Bai Tu Long Bay

Quang Ninh Decision 43/2024 tells the captain to inform passengers and move the boat to shelter when the weather becomes unsafe. Whether boats may leave port again is decided by the Inland Waterway Port Authority (Cảng vụ). A boat carrying overnight guests may not also take on day-sightseeing passengers.

Lan Ha Bay and the Cat Ba bays

Under Hai Phong Decision 253/2025, when the port authority, traffic police, border guard or the Cat Ba Bays Management Board order boats back to a safe anchorage, the captain must comply. The same decision says ending a cruise earlier than contracted needs the written consent of the guests' representative. What a shortened cruise is worth in money is still set by the listing.

A night cut short is not a night refunded unless the listing or the seller says so. Ask the guide on board what the operator offers, and keep the time the boat turned back. How the night on board is planned hour by hour is on the Halong Bay overnight cruise page.

the deposit

The license deposit is not a refund fund

Every licensed travel company in Vietnam holds a bank deposit. Decree 168/2017 sets it at VND 100,000,000 (about US$3,901) for a domestic tour operator; international licenses hold more. Decree 94/2021 cut the deposits for a while, and the original amounts apply again from 1 January 2024.

The deposit is held for the license. It is not a fund that refunds canceled cruises. Decree 168/2017, as legal databases report it, lets the company draw on it in one emergency case: a tourist hurt in an accident or at risk of death who needs emergency return or treatment the company cannot pay for in time. After a license is revoked, the deposit goes back to the company only if no complaint about its obligations to tourists arrives within 20 days of the revocation being published.

How to look a company up in the national license database, and where to complain, is on safety on the bays.

the order of calls

Who to ask for your money

  1. The seller you paid. For refunds or changes, the UK FCDO advises travelers to contact their travel provider first. If you booked on GetYourGuide, Viator, Klook or TourRadar, that is the booking site; quote the cancellation line from your confirmation.
  2. The operator. The cruise company runs the boat and knows whether its departure was refused. Ask for a new date if the listing allows changes.
  3. Your travel insurance. Policies differ on storms and canceled tours; read yours for weather and for missed departures.
  4. A complaint. If the seller holds money it owes, the Ha Long Bay Management Board's hotline and the license database are on the safety page.

when it matters

The storm months

The UK FCDO advises travelers in the storm season to be prepared to change travel plans at short notice. From storm tracks of 1991 to 2025, a one-night cruise starting in September has 4% to 8% odds that a storm stop overlaps it; for March the tracks show none recorded in 1991 to 2025. A model of the odds, not a forecast.

If you travel between June and October, a free-cancellation window that closes near the start date leaves you the most time to watch the forecast. The board's stop notices that carry a date were dated the same day as the stop or the day before (3 notices that carry a date), so even a window that closes the day before has often closed by the time a stop is ordered: decide on the forecast, not on the notice. The odds for every month and every length of cruise are on the best time to visit Halong Bay.

questions

Questions about storm cancellations

Do I get a refund if a storm cancels my Halong Bay cruise?

Only on the terms of your listing. The port authority's stop orders boats to stay in port and says nothing about money. Many listings offer free cancellation until a set time before the start; some are non-refundable, and one Klook listing lets only the operator cancel, for extreme weather. Read your listing's line before the window closes.

Who decides that Halong Bay cruises are canceled?

For Halong Bay and Bai Tu Long Bay, the Quang Ninh Inland Waterway Port Authority stops departure permits, on the direction of the provincial disaster steering committee. In Lan Ha Bay the Hai Phong port authority applies Decision 253/2025. Out on the water, the captain moves the boat to shelter when the weather turns.

Is it better to book through GetYourGuide, Viator or Klook?

No booking site protects you better as a whole. Terms are set listing by listing: on Viator, most cruises offer free cancellation until shortly before the start, while a few are non-refundable. Klook's overnight windows are often longer than its day cruises'. Compare the cancellation line of the exact cruise you want.

Does the travel company deposit cover a canceled cruise?

No. A travel company's bank deposit is held for its license under Decree 168/2017. It is not a fund that refunds canceled cruises. The company may draw on it for a tourist's emergency return or treatment, and after a license is revoked complaints can delay its release to the company.

What if the cruise is stopped while I am on board?

The captain informs passengers and takes the boat to shelter, as the provincial rules require. On the Cat Ba bays, ending a cruise earlier than contracted needs the written consent of the guests' representative. Whether part of the price comes back depends on the listing and the seller; ask the guide and note the time.

Sources

  1. Under Quang Ninh Decision 43/2024/QĐ-UBND, when weather becomes unsafe the captain must tell passengers and move the boat to shelter, and the decision to grant a port departure permit rests with the Inland Waterway Port Authority (Cảng vụ). Quang Ninh Provincial People's Committee, Decision 43/2024/QĐ-UBND of 8 Oct 2024 (in force 20 Oct 2024), Regulation on managing inland waterway vessels serving tourists on Halong Bay and Bai Tu Long Bay, 8 October 2024.
  2. Under Hai Phong Decision 253/2025/QĐ-UBND, when the port authority, traffic police, border guard or Cat Ba Bays Management Board order boats back to a safe anchorage in bad weather, the captain must comply. Hai Phong City People's Committee, Decision 253/2025/QĐ-UBND (31 Dec 2025), Regulation on tourism and tourist boats on the Cat Ba bays, full text as reproduced by thuvienphapluat.vn, 31 December 2025.
  3. Under Hai Phong Decision 253/2025/QĐ-UBND, ending a Cat Ba bays cruise earlier than contracted requires written consent of the guests' representative. Hai Phong City People's Committee, Decision 253/2025/QĐ-UBND (31 Dec 2025), Regulation on tourism and tourist boats on the Cat Ba bays, full text as reproduced by thuvienphapluat.vn, 31 December 2025.
  4. Decree 168/2017/NĐ-CP Art. 14 sets the bank deposit for a domestic tour operator at VND 100,000,000. Government of Vietnam, Decree 168/2017/NĐ-CP Art. 14 and Decree 94/2021/NĐ-CP, texts as reproduced by thuvienphapluat.vn, 31 December 2017.
  5. The UK FCDO advises travelers in the storm season to be prepared to change travel plans at short notice. UK Foreign, Commonwealth & Development Office, Foreign travel advice: Vietnam, 21 September 2026.
  6. The UK FCDO advises that for refunds or changes to travel plans, travelers should first contact their travel provider. UK Foreign, Commonwealth & Development Office, Foreign travel advice: Vietnam, 21 September 2026.
  7. Under Circular 06/2017/TT-BVHTTDL as amended (consolidated 2026), after a travel license is revoked the deposit is released to the company only if, counted from publication of the revocation, no complaint about obligations to tourists arrives within 20 days. Ministry of Culture, Sports and Tourism, consolidated text (VBHN 2026) of Circular 06/2017/TT-BVHTTDL as amended to Circular 21/2025/TT-BVHTTDL.
  8. Decree 168/2017/ND-CP, as reported by legal databases, lets a travel company temporarily draw on its deposit when a tourist suffers an accident or life-threatening risk needing emergency return or treatment and the company cannot pay in time: yes. Decree 168/2017/ND-CP (Government of Vietnam), as summarised by legal databases, 31 December 2017.
  9. Decree 94/2021/ND-CP cut travel business deposits by 80% temporarily, with the original Decree 168/2017 amounts applying again from 1 January 2024. Decree 94/2021/ND-CP (Government of Vietnam), as summarised by legal databases, 28 October 2021.
  10. Under Quang Ninh Decision 43/2024/QD-UBND a boat carrying overnight guests may not also take on day-sightseeing passengers, and the overnight anchorages are set by the Bay Management Board, which is the Ha Long Bay Management Board (Halong Bay) or the Bai Tu Long National Park Management Board (Bai Tu Long Bay). Quang Ninh Provincial People's Committee, Decision 43/2024/QD-UBND, Articles 3 and 8(3), 8 October 2024.
  11. Storm suspensions on Halong Bay stop departure permits; they are issued by the Quang Ninh inland waterway port authority (Cảng vụ Đường thủy và Đăng kiểm phương tiện thủy nội địa, under the provincial Department of Construction) on the direction of the provincial disaster steering committee, or come as a notice of the provincial Department of Agriculture and Environment to that authority (Matmo 2025, Storm No.1 2026); the body that stops the permits is Quang Ninh Inland Waterway Port Authority. Ha Long Bay Management Board website, suspension notices 2025-2026 (posts 240, 268, 287, 292, 990, 1215), 3 July 2026.
  12. Quang Ninh storm suspension notices name no wind threshold; they run from a stated hour until the final official bulletin on the storm or tropical depression, in the wording until the final bulletin on the storm. Quang Ninh Inland Waterway Port Authority, document 266/CVĐTNĐ-ATQLKCHT of 21/8/2026, as posted by the Ha Long Bay Management Board, 21 August 2026.
  13. The Ha Long Bay Management Board website published seven storm or tropical depression suspension notices between June 2025 and November 2026 and one reopening notice (after Typhoon Yagi, 2024); the count of suspension notices is 7 notices. Ha Long Bay Management Board website, full post index ids 1-1365 read 2026-11-14, 14 November 2026.
  14. Partner listing details. Each partner listing page as read on its read date (pier, cancellation terms, rating)
  15. Days and nights of each cruise. Each partner listing's duration and itinerary as read on its read date
  16. Exchange rates. VND per unit of each currency. USD: State Bank of Vietnam (Ngân hàng Nhà nước Việt Nam), Tỷ giá page, 14 November 2026; AUD: State Bank of Vietnam (Ngân hàng Nhà nước Việt Nam), Tỷ giá page, 12 November 2026; GBP: State Bank of Vietnam (Ngân hàng Nhà nước Việt Nam), Tỷ giá page, 12 November 2026
  17. Storm odds and weather by month. Storm tracks: NOAA NCEI IBTrACS v04r01, seasons 1991 to 2025, systems within 150 km to 350 km of Halong Bay; a stop counted as 2 days from the board notice to the final national bulletin. Weather: NOAA Global Summary of the Day, Phu Lien (Hai Phong) and Bach Long Vi, 1996 to 2024; sea surface temperature: NOAA OISST v2.1, the grid cell south of Cat Ba Island, 1991 to 2020. Stop log: Ha Long Bay Management Board notices and the national final storm bulletins (data/suspensions.json).

Photographs

  1. Ha Long International Cruise Port (Bai Chay). Photo: Jakub Hałun / Wikimedia Commons, CC BY 4.0
  2. Halong Bay in mist or fog. Photo: mmmmngai@rogers.com / Wikimedia Commons, CC BY-SA 2.0