Wonder Cave is a

show cave A show cave—also called tourist cave, public cave, and, in the United States, commercial cave—is a cave which has been made accessible to the public for guided visits. Definition A show cave is a cave that has been made accessible to ...

located in the

Balcones Fault The Balcones Fault or Balcones Fault Zone is an area of largely normal faulting Edwards Aquifer in the U.S. state of Texas that runs roughly from the southwest part of the state near Del Rio to the north-central region near Dallas along Inte ...

San Marcos, Texas San Marcos ( ) is a city and the county seat of Hays County, Texas, United States. The city's limits extend into Caldwell and Guadalupe Counties, as well. San Marcos is within the Austin–Round Rock metropolitan area and on the Interstate 35 ...

. Its entrance is one mile southwest of the county courthouse in San Marcos. The cave is reported to be the only commercially operated dry-formed cave in the United States ("dry-formed" because the fissure was opened not by erosion but by the earthquake that produced the Balcones Fault). The fault itself is visible in the cave's ceiling. Originally named Bevers Cave after Mark Bevers, who discovered it in 1893, the cave for a while concealed Bevers' illicit distilling and gambling enterprises. The cave is also home to Wonder World amusement park, which features tours of the multichambered cave and a wildlife park. .See the Hill Country Inside and Out at Wonder World - Hill Country Sun
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San Marcos, Texas Caves of Texas Show caves in the United States Tourist attractions in Hays County, Texas Landforms of Hays County, Texas {{HaysCountyTX-geo-stub