Mentioned by Leisure Pass Group
10+ Things to Do in San Antonio with Kids for a Fun Family Vacation
"Go on a guided adventure at 180-feet below ground and travel through a half-mile of the largest, most extensive cavern in the San Antonio area. This is perfect for the adventurous kids, the ones you can't get to come back inside after a long day of play. You'll learn about history and science, dating all the way back to the Cretaceous period."