Nearly every evening from May through October visitors can catch their emergence from the tunnel at Texas’ smallest state ...

Almost as soon as the rails were pulled up in 1942, bats moved into the old railroad ... nightly from the tunnel to feed from the smallest wildlife management area in the state parks system.

The first parks were opened to the public in the 1930s and the newest, Old Tunnel State Park, opened in 2012. TPWD also has ...