Contrary to cenote cavern diving, cenote cave diving requires special equipment and training (certification for cave diving). However, both cavern and cave diving require detailed briefings, diving experience, and weight adjustment to freshwater buoyancy. The cenotes are usually filled with rather cool fresh water. Cenote divers must be wary of possible halocline; this produces blurred vision until they reach a more homogeneous area. Notable cenotes Australia Ewens Ponds, near Mount Gambier, South Australia Kilsby Sinkhole, near Mount Gambier, South Australia Little Blue Lake, near Mount Schank, South Australia Bahamas Thunderball Grotto, on Staniel Cay Belize Great Blue Hole Canada Devil's Bath is the largest cenote in Canada at a size of 1178 ft. (359m) in diameter and 144 ft. (44m) in depth. It is located near the village of Port Alice, British Columbia on the northwest coastline of Vancouver Island. Devil's Bath is continuously fed by an underground spring and is connected by underwater tunnel to the Benson River Cave. Dominican Republic Hoyo Azul (Punta Cana) Los Tres Ojos Ojos Indigenas (Punta Cana) Jamaica Blue Hole (Ocho Rios) Mexico Central and northern regions Zacatón, Tamaulipas Yucatán Peninsula Dos Ojos, Municipality of Tulum Dzibilchaltun, Yucatán Ik Kil, Yucatan Gran Cenote, Municipality of Tulum Hubiku, Yucatan Sacred Cenote, Chichen Itza Xtacunbilxunan, Bolonchén Cenote Azul, Playa del Carmen Jardin Del Eden, Bacalar Choo-Ha, Coba Zaci, Valladolid El Zapote, the site of the Hells Bells bell-like rock formation United States Blue Hole, Santa Rosa, New Mexico Blue Hole, Castalia, Ohio Bottomless Lakes, near Roswell, New Mexico Montezuma Well, Verde Valley, Arizona Hamilton Pool, Austin, Texas Zimbabwe Chinhoyi Caves in Zimbabwe See also References Citations Other sources External links Cenotes of Chichén Itzá Doline, Sinkhole, Cenote Sistema Zacatón Stages in the Formation of a Cenote Volcanic karstification of Sistema Zacaton, Mexico (Gary, Sharp, 2006) Year 1999 Cenotes Conference in Perugia, Italy Cave geology Caves of Mexico Geography of Yucatán Karst caves Locations in Maya mythology Natural history of Mesoamerica Cenote Karst formations of Mexico