The official web site for the CDG of Great Britain.
An organisations undertaking exploration of deep underwater caves in North Florida.
Cave Divers Association of Australia.
Multiple discussion boards feature gear exchange, trip reports, incident reporting and analysis, buddies and resources.
An organisation undertaking exploration, scientific study and mapping of water filled caves and related features in México and Central America.
National Association For Cave Diving based in Florida, USA.
Underwater photographs of the cenotes in the Riviera Mayan region of Mexico.
Exploration, survey and cartography of the underwater caves of Quintana Roo, Mexico.
The national organisation for Australia.
A basic introduction to safe cave diving with some nice photographs.