Cave diver with line reel in sump underwater passage Wales UK

Mine/cave diving sites in the UK – UK Mine/Cave Diving and Exploration

the inside story of the remotest ever cave dive

Cave diving regions of the world - Wikipedia

Wetsuit diving helmet hi-res stock photography and images - Alamy

British cave diver Martyn Farr to join a team attempting a record

Sump cave hi-res stock photography and images - Alamy

Martyn Farr

Swildon's Hole – Through Sump 1 & Beyond – Berkeley Square Barbarian

Lights underwater diver hi-res stock photography and images - Page 2 - Alamy

Evolution of Caving and Cave Diving Equipment

Spelunker in cave hi-res stock photography and images - Page 6 - Alamy