Open-air pit cave in Aquismón, San Luis Potosí, Mexico
Sótano de las Golondrinas
A flock of conures in the Cave of Swallows
Location
Aquismón, San Luis Potosí, Mexico
Length
VR = 515 m Entrance pit:
L = 135 m
W = 305 m
H = 333–376 m
Ar = 33,110 m²
Discovery
27 December 1966[1]
Hazards
Free fall
Access
No restrictions to view entrance; permit required to descend
Top of Golondrinas as viewed from the low side, during a descent made in 1979A caver rappels the drop from the cave's mouthCross section of the cave
The Cave of Swallows, also called the Cave of the Swallows (Spanish: Sótano de las Golondrinas), is an open-air pit cave in the municipality of Aquismón, San Luis Potosí, Mexico. The elliptical mouth, on a slope of karst, is 49 by 62 m wide[2] and is undercut around all of its perimeter, widening to a room approximately 303 by 135 meters (994 by 442 ft) wide.[2] The floor of the cave is a 333-meter (1,092 ft) freefall drop from the lowest side of the opening, with a 370-meter (1,214 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]
^Date of first documented exploration, the cave has been known locally for at least many centuries
^ abcRussell, William H.; Terry W. Raines (1967). Caves of the Inter-American Highway. Association of Mexican Cave Studies.
^Hunker, Louisa. "Pits in Potosi". The Leader. National Outdoor Leadership School. Archived from the original on 31 August 2006. Retrieved 12 April 2007.
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