Shuanghedong
China
437400 m long · 912 m deep
Clearwater Cave System
Malaysia
265882 m long
Optimisticeskaja
230000 m long
Optymistychna Cave
230000 m long
Siebenhengste-Hohgant-Höhle
Switzerland
164500 m long · 1340 m deep
Schönberg-Höhlensystem
Austria
156900 m long · 1061 m deep
Priest's Grotto
Ukraine
140490 m long · 35 m deep
Hirlatzhöhle
Austria
118250 m long · 1559 m deep
Sistema Huautla
Mexico
100242 m long · 1560 m deep
Three Counties System
90000 m long · 253 m deep
Gouffre de la Pierre Saint-Martin
Spain
88111 m long · 1410 m deep
Sistema Dos Ojos
Mexico
82472 m long · 119.1 m deep
Candelaria Caves
Guatemala
80000 m long
Sudwala Caves
South Africa
79012 m long
Hellhole
United States
70167.2 m long · 224.6 m deep
Ease Gill Cave System
United Kingdom
66000 m long · 137 m deep
Ogof Ffynnon Ddu
United Kingdom
59000 m long · 274.5 m deep
Tenglong Cave
China
52800 m long
Wakulla Springs
United States
51482.8 m long · 106.7 m deep
Lamprechtsofen
Austria
51000 m long · 1727 m deep
Mlynky
Ukraine
50000 m long
Migovec System
Slovenia
45329 m long · 972 m deep
Gouffre Berger
France
45000 m long · 1271 m deep
Cumberland Caverns
United States
44578.7 m long
Eisriesenwelt
Austria
42000 m long
Réseau du Clot d'Aspres
France
42000 m long · 1066 m deep
Lysenia
Ukraine
34000 m long
Ogof Agen Allwedd
United Kingdom
32500 m long
Choranche Cave
France
32301 m long · 425 m deep
Thien Duong Cave
Vietnam
31000 m long
Ogof y Daren Cilau
27000 m long · 192 m deep
Akkadō
Japan
23702 m long · 280 m deep
Gaping Gill
United Kingdom
21000 m long · 192 m deep
Boybuloq
Uzbekistan
18400 m long · 1517 m deep
Gournier cave
France
18000 m long · 680 m deep
Veryovkina Cave
Georgia
17500 m long · 2209 m deep