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The Xiaozhai Tiankeng (小寨天坑), also known as the Xiaozhai Heavenly Pit, is the world's deepest sinkhole. [1] It is located in Fengjie County of Chongqing Municipality in China . Dimensions
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 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.
Pozzo del Merro, Italy, is the world's second deepest underwater pit cave, the deepest part reached (as of October 2014) is 392 m (1,286 ft). Gouffre Mirolda , Haute-Savoie , France , has a depth of −1,733 m (−5,686 ft).
The 12,262-metre (40,230 ft) deep Kola Superdeep Borehole has been the world's deepest borehole since 1979. [ 1 ] [ 28 ] It was also the longest borehole in the world from 1979 to 2008.
This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
The floor of the cave is a 333 m (1,093 ft) freefall drop from the lowest side of the opening, with a 370 m (1,210 ft) drop from the highest side, [2] making it the largest known cave shaft in the world, the second deepest pit in Mexico and perhaps the 11th deepest sheer drop in the world. [3] [a]
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.