Located in Playa del Carmen, Yucatan, Mexico and providing training for cenote and cavern diving. Training and dive site details, local history, pictures and accommodation options.

Information and pictures of a number of caves in Hungary.

Dedicated to exploration and scientific investigations of underwater caves in the Bahamas. Includes general information, photos and a list of publications. Located in Charleston, South Carolina, United States.

Extreme underwater video production and services. DVDs for sale, technical diving instruction, expeditions and information on available services.

Pictures and descriptions of cave diving trips in Mexico and Florida, including some of the more off the beaten track sites.

South Georgia enthusiast offers statistical summary of his dives, articles, photos, projects, tips, files. Includes contact form.

Information on cave diving in the North Central Florida springs area and Mexico. Pictures, descriptions and links.

Safety information from the San Marcos Area Recovery Team, National Speleological Society, USA.

The main organisation for cave divers in the USA.

Discussion group covering all the various aspects of cavern & cave diving worldwide. Posts, calendar, members list, advice, locations, trip reports.