Cave of Swallows
A deep natural shaft cave in San Luis Potosí, Mexico, with a vast vertical drop and colonies of swifts and green parakeets.
Pit cave: A cave dominated by a deep vertical shaft or series of shafts. The Cave of Swallows is a celebrated example of this cave form.
Huasteca Potosina: A tropical region of eastern San Luis Potosí, Mexico, known for rivers, waterfalls, and limestone landscapes. The Cave of Swallows lies within this region.
Cave conservation: The protection of caves, their geological features, ecosystems, and cultural resources. Protecting the shaft also means safeguarding its nesting wildlife and fragile cave environment.
Cave of the Crystals: A cave in Naica, Mexico, famous for enormous gypsum crystals and extreme heat. Unlike this crystal chamber, the Cave of Swallows is known for its open vertical shaft and birds.
Karst topography: Terrain shaped by the dissolution of soluble rock, commonly producing caves, sinkholes, and underground drainage. Dissolution of limestone helped create the cave's deep shaft.
Aquismón: A municipality in San Luis Potosí, Mexico, in the Huasteca region. The cave is located near the town of Aquismón.
Cave tourism: Travel to caves for recreation, education, or appreciation of geological and biological features. Visitors come to observe the cave's scale and bird flights.
Cenote: A water-filled sinkhole formed when limestone bedrock collapses or dissolves. Cenotes are commonly water-filled, while the Cave of Swallows is a dry, deep shaft.
Limestone: A sedimentary rock composed chiefly of calcium carbonate, often formed from accumulated marine material. The cave formed in soluble limestone that groundwater could dissolve.
Sótano de las Golondrinas depth: The measured vertical extent of the Cave of Swallows, including its entrance shaft and deeper chambers. Published depth figures distinguish the entrance drop from the cave's total depth.