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Caves

The Cave of Swallows in Mexico is a 400m vertical shaft, deep enough to engulf the Empire State Building. The Lechuguilla cave system in the USA is 193km long and 500m deep with astonishing crystal formations hanging from its chambers. Although often overlooked, caves are remarkable habitats with equally bizarre wildlife. Cave angel fish cling to the walls behind cave waterfalls with microscopic hooks on their flattened fins. Cave swiftlets navigate by echo-location and build nests out of saliva. The Texas cave salamander has neither eyes nor pigment. Unique access to a hidden world of stalactites, stalagmites, snotites and troglodytes brings a wealth of surprises.

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  • Originally Aired March 26, 2006
  • Runtime 57 minutes
  • Content Rating United States of America TV-G
  • Production Code 104
  • Network BBC One
  • On Other Sites IMDB
  • Created April 27, 2021 by
    DesertCookie
  • Modified October 18, 2023 by
    Mattman583 mod
Name Type Role
Alastair Fothergill Director