Most caves in Texas are located on private land. You must have permission of the owner to visit their caves. Trespassing by kids and non-cavers has caused many owners to close their caves to everyone. That is a great loss.
Caves are a precious natural resource.
Some caves have locked gates placed over their entrances, but most of them can still be explored if you get permission from the owner. There are a few caves around Austin which can be explored without permission. These are real caves and require some physical ability, hard hats, and 3 light sources. There are no trails, no electric lights, and a lot of mud. Contact local grotto officers for directions.