Mysteries underground

Journey with the underworld of caves, including the deepest and exotic cave, the new Mexico a Lechuguilla. Other twisting, dripping, gleaming underground wonders also includes the Mammoth and Flint Ridge Cave system creating the longest cave network in the world.

Bibliographic Details
Corporate Author: National Geographic Society (Washington, D.C.)
Other Authors: Friedberg, Lionel
Resource Type: Visual Material
Published: Washington, D.C. The Society c1992.