| Akumal Cave Dwellers | Cenote diving on Mexico's Yucatan |
| Akumal Dive Center | Dive center in Cancun, Mexico |
| Aquaspeleo | Cave and cavern dive training in Live Oak, FL |
| Birds Underwater | Dive center with instruction, cave dives, Nitrox, Tri-Mix, rebreathers and manatee dives in Crystal River, FL |
| Bonne Terre Mine | Dive resort in Bridgeton, MO (yes Missouri, it's an abandoned mine) |
| Bonsai Inn Hotel | Hotel in Bonito with cave diving and other adventures |
| Cave Divers Association of Australia | Cave diving club in Australia |
| Cave Divers Corner | Cave diving information |
| Cave Diving | Cave diving information |
| Cave Diving Group of Great Britain | Cave diving club in England |
| Cave Diving Page | Cave diving information |
| Cave Diving Section of the National Speleological Society | National Speleological Society: Cave Diving Section |
| Cavediving | Cave diving information |
| El Jacinto Pat | Cenote diving on Mexico's Yucatan |
| Global Underwater Explorers | |
| Hotel Club Akumal Caribe | Resort for cenote diving on Mexico's Yucatan |
| Hungarian Cave Diving | Cave diving club in Hungary |
| Jeff Bentley's Cave Diving Page | Cave diving information |
| Loco Gringo Underground | Cenote diving on Mexico's Yucatan |
| Mike Madden's CEDAM Dive Centers | Cenote diving on Mexico's Yucatan |
| National Association for Cave Diving | |
| Pousada Olho d' Įgua | Resort in Bonito with cave diving and other adventures |
| Reef Scuba Accessories | Manufacturers of pony bottle brackets, wreck, cave, safety & technical dive reels, and speciality hardware |
| Scuba Cancun | Dive center in Cancun, Mexico |
| Seafari Adventures Diveshop | Dive center in Cozumel, Cancun, and Plya delCarma Mexico with ocean dives as well as cave and cavern diving. |
| Sport Diver HQ | Advanced diving information |
| Sport Diver HQ | Advanced diving information |
| Thailand Cave Diving Project | Cave diving exploration in Thailand |
| Underwater Caves of El Jacinto Pat (The) | Cave diving information |
| Villas DeRosa | Cenote diving on Mexico's Yucatan |
| Vortex | Cave dive site located in Ponce de Leon, FL |
| Young Ed's Cave Diving Page | Cave diving information |
| Yucatan Expiditions | Cenote diving on Mexico's Yucatan |
