Carlsbad Caverns

Fascinating overview of Carlsbad Caverns from the late 1970s.

This detailed plan shows the expansive cave system of Carlsbad Caverns in Carlsbad Caverns National Park, New Mexico. Natural features like stalagmites, columns, and even bat guano are identified in the legend, along with the various path markers (including several unsurveyed).

Published in 1979 by the Cave Research Foundation, who continues to work on mapping and preserving Carlsbad Caverns in addition to other subterranean projects around the country. The year prior to publication, the Carlsbad Caverns Wilderness was established with the signing of the National Parks and Recreation Act by President Jimmy Carter.

Source.