On January 3, 1913, The San Antonio, Fredericksburg and Northern Railway was chartered to connect Fredericksburg with the San Antonio and Aransas Pass Railway near Waring. In 1913 a long railroad tunnel was built. The cost of the tunnel sent the railroad into receivership on October 28, 1914. It was sold under foreclosure on December 31, 1917, to Martin Carle who deeded the property to the Fredericksburg and Northern Railway, which had been chartered on December 26 of that year. The train operated until July 27, 1942. Since the shutdown of the railway the tunnel has become a bat cave, hosting over 3 million Mexican free-tailed bats. In 2012 it became Old Tunnel State Park, with provides picnic and restroom facilities for visitors.
