Titan

United Kingdom

17000 m long · 141.5 m deep

Pollnagollum–Poulelva

Ireland

16000 m long · 140 m deep

Dan yr Ogof

United Kingdom

15500 m long

Big Bone Cave

United States

15494 m long

Sof Omar Cave

Ethiopia

15100 m long

Orlova Chuka Cave

13437 m long

Blauhöhle

Germany

13100 m long · 42 m deep

Slaughter Stream Cave / Wet Sink

United Kingdom

13000 m long · 100 m deep

Marble Arch Caves

11500 m long · 94 m deep

Mossdale Caverns

United Kingdom

10500 m long · 76 m deep

Yagodinska Cave

10500 m long

Tham Luang Nang Non

Thailand

10300 m long · 85 m deep

Malcham Cave

Israel

10000 m long

Spannagel Cave

Austria

10000 m long

Langcliffe Pot

United Kingdom

9600 m long · 116 m deep

Swildon's Hole

United Kingdom

9144 m long · 167 m deep

Jeita Grottoمغارة جعيتا

Lebanon

9000 m long

Sơn Đoòng Cave

Vietnam

9000 m long · 150 m deep

Manjanggul

South Korea

8928 m long

Verteba Cave

Ukraine

8555 m long

Cross Cave

Slovenia

8273 m long · 32 m deep

Demänovská Cave of Liberty

Slovakia

8126 m long

Bournillon Cave

France

7886 m long

Gwangmyeong Cave

7800 m long · 275 m deep

Phong Nha Cave

Vietnam

7729 m long

Vjetrenica Cave

Bosnia and Herzegovina

7014 m long

Ogof Craig a Ffynnon

United Kingdom

7000 m long

St Cuthbert's Swallet

United Kingdom

6700 m long · 145 m deep

Atta CaveAttahöhle

Germany

6670 m long

White Scar Caves

United Kingdom

6500 m long

Caverna da Tapagem

Brazil

6237 m long · 175 m deep

Stump Cross Caverns

United Kingdom

6200 m long

Gargantua

Canada

6001 m long · 286 m deep

Lurgrotte

Austria

5975 m long · 273 m deep

Morca Cave

Turkey

5714 m long · 1276 m deep

Shannon Cave

Ireland

5400 m long · 130 m deep