Nohoch Nah Chich Nohoch Nah Chich was a massive cave system with more than 60 kilometres of mapped passage until it was connected by exploring cave divers to the larger system Sac Actun. Being the smaller of the two systems, Nohoch Nah Chich was consumed by Sac Actun. The cenote retained its name, but the cave system name was replaced.
Fossils in Ponderosa The limestone in cave system Ponderosa is richly embedded with fossilised shells. This amazing cave feature can actually make diving the system quite treacherous. The fossil-rich rock is fragile and exhaled gas can bring large amounts of silt, pebbles, fossils and even large rocks down on your head as you're diving. Very fine limestone can turn the water milky and lower visibility to nothing.
Mexican cave system K'oox Baal Travelling through an underground and underwater labyrinth with a piece of string to guide you - it's the stuff of dreams for cave divers!
Ox Bel Ha The Quintana Roo Speleological Society lists the length of the Mexican cave system Ox Bel Ha as 270,174 metres with 143 cenotes.
Tank Cave, Australia Australia's Tank Cave was first dived in the early 1960s. Access was difficult and very little exploration was done. In the 1980s more passage was found and kilometres of permanent line have been laid in the years since.
Hell's BellsHow did they form and why are they only found in one cenote in Mexico? This is the unsolved mystery of Hell's Bells, the crazy formations found in Cenote Zapote.
Cenote Otoch HaIs this cave's history written on the walls? A dark ring stain around the ceiling of this room is a feature of the cave extending from Cenote Otoch Ha in Mexico.
Stage tank cave diving Two scuba tanks is considered the safe minimum for cave diving. A trained cave diver that wants to go further into the cave will add additional tanks, called stage tanks, to their gear.
Vaca Ha Cenote Vaca Ha is now open to cave divers after being closed for several years following a drowning in the nearby Cenote Tortuga. It is part of cave system Zapote which has nearly 8 kilometres of mapped passage.
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