Cave a cave or cavern

Records and superlatives

The cave system with the greatest total length of surveyed passage is Mammoth Cavein Kentucky, US, at
652 km (405 mi).^[15]
The longest surveyed underwater cave, and second longest overall, is Sistema
Sac Actun inYucatán, Mexico at
335 km (208 mi).^[15]
The deepest known cave — measured from its highest entrance to its lowest point — is Veryovkina Cave in Abkhazia,
Georgia, with a depth of 2,204 m
(7,231 ft).^[16] This was the first cave to be explored to a depth of more than 2 km (1.2 mi). (The first cave to be descended below 1 km (0.62 mi) was Gouffre Berger in France.) The Sarma and Illyuzia-Mezhonnogo-Snezhnaya caves in Georgia, (1,830 m or 6,000 ft, and 1,753 m or 5,751 ft respectively) are the current second- and thirddeepest caves.^[16] The deepest outside Georgia is Lamprechtsofen
Vogelschacht Weg Schacht in Austria, which is 1,623 m (5,325 ft) deep.^[16]
The deepest vertical shaft in a cave is
603 m (1,978 ft) in Vrtoglavica Cave in Slovenia. The second deepest is Ghare-Ghala at 562 m (1,844 ft) in the Parau massif near Kermanshah in
Iran.[17]
The deepest underwater cave bottomed by a remotely operated underwater vehicle at 404 metres
(1,325 ft), is the Hranice Abyss in the
Czech Republic.^[18]
The largest known room is Sarawak
Chamber, in the Gunung Mulu National Park(Miri,Sarawak,Borneo,Malaysia), a sloping, boulder strewn chamber with an area of approximately 700 by 400 m (2,297 by 1,312 ft) and a height of 80 m
(260 ft). The nearby Clearwater Cave System is believed to be the world's largest cave by volume, with a calculated volume of 3,800,000 m³ (130,000,000 cu ft).^[19] The largest room in a show cave is the salle de La Verna in the FrenchPyrenees.
The largest passage ever discovered is in the Son Doong Cave in Phong NhaKẻ Bàng National Park in Quảng Bình Province,Vietnam. It is 4.6 km (2.9 mi) in length, 80 m (260 ft) high and wide over most of its length, but over 140 m (460 ft) high and wide for part of its length.[20]