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Hranice Abyss. Hranice Abyss (Czech: Hranická propast) is the deepest flooded pit cave in the world. It is a karst sinkhole near the town of Hranice, Czech Republic.The greatest confirmed depth is 519.5 m (1,704 ft), of which 450 m (1,476 ft) is underwater.
This is a list of caves of the world that have articles or that are properly cited. They are sorted by continent and then country. They are sorted by continent and then country. Caves which are in overseas territories on a different continent than the home country are sorted by the territory's continent and name.
A cave diver running a reel with guide line into the overhead environment. Cave diving is underwater diving in water-filled caves.The equipment used varies depending on the circumstances, and ranges from breath hold to surface supplied, but almost all cave diving is done using scuba equipment, often in specialised configurations with redundancies such as sidemount or backmounted twinset.
This list of deepest caves includes the deepest known natural caves according to maximum surveyed depth as of 2024. The depth value is measured from the highest to the lowest accessible cave point. The depth value is measured from the highest to the lowest accessible cave point.
This list of longest caves by country includes the longest-known natural cave per country. To be listed, the caves must have been surveyed to cave surveying standards , and the results published in reliable sources.
Caves are found around the world. The largest form in areas of karst landforms whose rocks dissolve easily. Preferable conditions for karst cave formation are adequate precipitation, enough plants and animals to produce ample carbon dioxide, and a landscape of gentle hills which drains slowly.
Considered one of the largest sinkholes (dolinas) in the world; Gruta do Centenário – a cave located in Mariana, Minas Gerais, the largest and deepest quartzite cave in the world, and second in the country in terms of unevenness; Lapa Terra Ronca – a dolomitic limestone cave inside the area of the Terra Ronca State Park in Goiás.
'Three Paths of Water'; short Ox Bel Ha) is a cave system in Quintana Roo, Mexico. It is the longest explored underwater cave in the world [2] and ranks second including dry caves. [3] As of January 2024 the surveyed length is 496.8 kilometers (308.7 mi) of underwater passages. [2] There are more than 160 cenotes in the system. [2] [4]