Brunette Girl With Blue Eyes Posing On Rocks In A Small Cave

• The longest surveyed underwater cave is Sistema Sac Actun in Yucatán, Mexico at 215 km (134 mi). The record has been exchanged several times with Sistema Ox Bel Ha, currently at 182 kilometres (113 mi).
• The deepest known cave (measured from its highest entrance to its lowest point) is Voronya Cave (Abkhazia), with a depth of 2,191 metres (7,188 ft). This was the first cave to be explored to a depth of more than 2 kilometres (1.2 mi). (The first cave to be descended below 1 kilometre (0.62 mi) was the famous Gouffre Berger in France.) The Illyuzia-Mezhonnogo-Snezhnaya cave in Abkhazia, (1,753 metres or 5,751 feet) and the Lamprechtsofen Vogelschacht Weg Schacht in Austria (1,632 metres or 5,354 feet) are the current second- and third-deepest caves. The deepest cave record has changed several times in recent years.
• The deepest vertical shaft in a cave is 603 metres (1,978 ft) in Vrtoglavica Cave in Slovenia. The second deepest is Patkov Gušt at 553 metres (1,814 ft) in the Velebit mountain, Croatia.
• The largest room ever discovered is the 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 metres (2,297 by 1,312 ft) and a height of 80 metres (260 ft). The nearby Clearwater Cave System is believed to be the world's largest cave by volume, with a calculated volume of 30,347,540 m3.