Wildlife Tunnel
The Wildlife Tunnel is an old abandoned railroad tunnel and is home to bats. The National Park Service has set up seating and pathways for visitors to view the bats as they leave the tunnel in the evenings. The Tunnel is located outside of Sisterdale on Old San Antonio Rd.

Park Entrance The history of the Tunnel View from the observation deck
Close up of Tunnel entrance Enough already!!! All about bats
The Tunnel The Tunnel I could actually see bats flying around at the other end.
Pathway leading down to the Tunnel