Descend into Danger Top 10 Deadliest  Caves Worldwide

10. Agua Azul Caves, Dominican Republic

9. El Capitan Cave, Arizona, USA

8. Blue John Cavern, Derbyshire, England

7. Sistema Huautla, Oaxaca, Mexico

6. Gaping Gill,  Yorkshire Dales, England

5. Cave of Swallows (Sótano de las Golondrinas), Mexico

4. Eagle's Nest Cave, Florida, USA

3. Ape Cave, Washington, USA

2. Devil's Den Cave, Florida, USA

1. Nutty Putty Cave, Utah, USA