Bahama Caves Research Foundation – Information on blue holes and underwater cave systems of the Bahamas including current exploration projects.

Blue Holes Foundation – Exploration and scientific investigations of underwater caves in the Bahamas.

Cave Divers Association of Australia – The national organisation for Australia.

Cave Diving Group – The official web site for the CDG of Great Britain.

Cave Diving in Greece – The exploration of Drakos and Polidrosso together with team, equipment and contact information.

Cave Diving Thailand – News and information about Thailand’s Cave Diving Project.

CDAA – Cave Divers Association of Australia.

DIR-Mexico – Cave Diving Training and Guiding in Mexico – DIR Mexico provides quality cave diving instruction, training and guiding in Mexico’s Yucatan Peninsula. GUE and NACD cave courses and instruction.

Dive Aventuras – PADI 5 Star IDC Center specializing in ocean, cavern and cave diving. Technical supplies and instruction available to cave divers and novices alike. NACD Introduction to Cave, Full Cave, Nitrox and Advanced Nitrox courses are available upon request.

Dive The New Frontier – Cave/cavern diving at the Mexican resort hotel of Villa de Rosa.

Doux de Coly – European Cave Diving Project 2001. Details of the European cave penetration record achieved in August 2001 by a pan-European team of divers.

German Cave Diving Mailing List – A mailing list established to promote an exchange of cave diving related issues via Internet.

Grupo de Exploracion Ox Bel Ha – A club dedicated to the exploration, survey and research of the cenotes and underground rivers of the Yucatan Peninsula.

Hooked On Cave Diving – Underwater photographs of the cenotes in the Riviera Mayan region of Mexico.

International List of Cave Divers On The Net – Contact and site information for cave divers around the world.

Loco Gringo Underground – A basic introduction to safe cave diving with some nice photographs.

Mexico Profundo – An organisation undertaking exploration, scientific study and mapping of water filled caves and related features in M�xico and Central America.

NACD – National Association For Cave Diving based in Florida, USA.

NSS Cave Diving Section – The main organisation for cave divers in the USA.

Quintana Roo Speleological Survey – Exploration, survey and cartography of the underwater caves of Quintana Roo, Mexico.

SMART Cave Diving Policy – Safety information from the San Marcos Area Recovery Team, National Speleological Society, USA.

Wakulla 2 Expedition – A US Deep Caving Team expedition aiming to produce a 3D virtual reality map of the underwater cave system which feeds Wakulla Spring.

Woodville Karst Plain Project – An organisations undertaking exploration of deep underwater caves in North Florida.