Become a Spelunker. Learn about the cave preserve, it’s unique endangered species, history, and geology. The cave is undeveloped, so sturdy shoes and appropriate apparel is recommended.

Caving helmets and lights will be supplied.

Robber Baron Cave is one of the most significant of the over 500 Bexar County (San Antonio), TX caves. It is the longest known cave in the county with 5340 feet (1627.5 m) of mapped passages. This cave has many interesting features including a large sinkhole entrance, a geologically complex two-dimensional maze of passages, a rich history, and several unique species, which live only underground.