Longhorn Cavern, limestone cave, central Tex., at Burnet. On the northern edge of the Edwards Plateau, the cave (explored length c.8 mi/13 km) lies beneath a triangular ridge rising above the valley of the Colorado River. Guided trails, 2 mi (3.2 km) long, have electric lighting.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.