Welcome to the new home of the compilation of long and deep caves of the world compiled by Bob Gulden for the Geology and Geography Section of the National Speleological Society. Bob worked tirelessly for decades to maintain these lists and I hope to keep his important legacy alive.

Please be patient as I get the databases moved over and process the updates and corrections that have been coming in. These can be sent to Cavemonpaul at Hotmail.com. Each list will have the date it was updated at the top.

Cave locations will not be given out, so do not ask. If you would like to donate to help keep this page going and to improve the features, click the button.

United States
USA Longest Caves (over 1 mile) – Updated 4/12/2025
USA Deepest Caves (over 350 feet) – Updated 1/10/2025
USA Longest Caves by State
USA Dome Climbs and Pits – Updated 9/25/2024

Worldwide
World Longest Caves (over 10km) – Updated 4/13/2025
World Deepest Caves (over 600m) – Updated 3/11/2025
World Longest Underwater Caves (over 1km) – Updated 02/21/2024
World Longest Caves by Country – Updated 4/02/2023
World Longest Gypsum Caves – Updated 4/02/2023
World Longest Lava Tube Caves – Updated 12/14/2022
World Longest Piping Caves – Updated 03/11/2025
World Longest Sea Caves – Updated 10/23/2024
World Longest non-traditional caves (conglomerate, chalk, ice, sandstone, quartzite, salt, etc.) – – Updated 1/13/2024

Worldwide Individual Features
Deep Pits and Climbs – Updated 03/11/2025
Free Fall Pits
Largest Chambers (by area)
Largest Chambers (by volume) – Updated 1/13/2024
Largest Trunk Passages