United States
72 caves
Hellhole
United States
70167.2 m long · 224.6 m deep
Wakulla Springs
United States
51482.8 m long · 106.7 m deep
Cumberland Caverns
United States
44578.7 m long
Big Bone Cave
United States
15494 m long
Laurel Caverns
United States
4972 m long
Crystal Cave
United States
3894.6 m long
Airman's Cave
United States
3444 m long · 9 m deep
Sinks of Gandy
United States
2473.1 m long
Kaumana Cave
United States
2197 m long
Howe Caverns
United States
1889.8 m long · 47.5 m deep
Secret Caverns
United States
1889.8 m long
Lava River Cave
United States
1588.3 m long
Tytoona Cave
United States
1280.2 m long
Skeleton Cave
United States
1085.1 m long
Boyden Cave
United States
1013.9 m long
Bluff Dweller's Cave
United States
996.1 m long
Grand Canyon Caverns
United States
733.3 m long · 210 m deep
Cheese Cave
United States
627.9 m long
Neffs Cave
United States
518.2 m long · 354.5 m deep
Lost River Caverns
United States
365.8 m long · 24.4 m deep
Blowhole Cave
United States
355.1 m long · 103.6 m deep
Derrick Cave
United States
345.6 m long · 16.2 m deep
Gardner Cave
United States
321.6 m long
Lovelock Cave
United States
48.8 m long · 12.2 m deep