Hang Sơn Đoòng Cave, Vietnam Aug 15, 2024

Hang Sơn Đoòng Cave, Vietnam

In 1991, logger Hồ Khanh stumbled upon something big in what is now Vietnam"s Phong Nha-Kẻ Bàng National Park. During a jungle expedition, he found the entrance to a cave with a roaring underground river. It was later named Hang Sơn Đoòng, or "cave of the mountain river" and in 2009, the British Cave Research Association led an expedition to explore it. They realized something incredible: It was the world"s largest cave. Hang Sơn Đoòng"s main passage is 3.1 miles long, 490 feet wide, and 660 feet high. That"s tall enough to fit a 40-story skyscraper.

© Geng Xu/Getty Images

palette

Today in History

Aug 15, 2018Best. Holiday. Ever.
Aug 15, 2019It’s surströmming time
Aug 15, 2020Celebrating the Acadians
Aug 15, 2021Swim city
Aug 15, 2022Indian Independence Day
Aug 15, 2023Piazza IX Aprile, Taormina, Sicily, Italy
Aug 15, 2025Spotted eagle rays in the Galápagos Islands

More Desktop Wallpapers:

Jun 14, 2023Flag Day
Jan 25, 2026Burns Night in Scotland
Oct 20, 2025International Sloth Day
Apr 3, 2025National Find a Rainbow Day
Aug 4, 2021A special day for a special cat
Mar 10, 2023Vale of Edale, Peak District, England
Mar 8, 2023International Womens Day
Dec 28, 2025Anniversary of the Endangered Species Act of 1973
Jun 27, 2025Splendid leaf frog
Jul 9, 2024Talampaya National Park, Argentina
Sep 9, 2019A toast to California!
Nov 27, 2019Have you turned off your electronic device?
Sep 9, 2022Belize Barrier Reef
Jun 5, 2018Up, up, and away for Hot Air Balloon Day
Jan 12, 2019Sailing across the ice
Sep 30, 2020All eyes on moths
Nov 11, 2018Poppies for Armistice Day
Jan 15, 2023Aura River in Turku, Finland
Jul 1, 2018Let the games begin
Sep 6, 2019The old guard at Old San Juan
Jul 23, 2018Tokyo welcomes a futuristic new art museum
Nov 18, 2024Porthcawl Lighthouse, Wales, UK
Mar 19, 2022Chicagohenge
Jun 27, 2024Duomo Santa Maria del Fiore, Florence
Mar 17, 2020It s a good day to be green
Dec 16, 2022Atlanta Botanical Garden
Aug 1, 2019Hawaii Volcanoes National Park turns 103
Sep 15, 2023National Hispanic Heritage Month
May 8, 2021World Migratory Bird Day
Dec 6, 2022Everglades National Park turns 75