Cave Without a Name
The Cave Without a Name is a limestone solutional cave in the Texas Hill Country region of Central Texas. It is a National Natural Landmark. The cave is located 40 mi (64 km) from downtown San Antonio, and 10 miles northeast of Boerne off FM 474 and Kreutzberg Road. It has been commercially operated as a show cave and open for public tours since 1939. It is a member of the National Cave Association.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).