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Old Tunnel Bat Cave

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Old Tunnel State Park is a railroad tunnel of the Fredericksburg and Northern Railway, which ceased operations in 1942. Since the shut down of the railway, the tunnel has become a bat cave, hosting over 3 million Mexican free-tailed bats and 3,000 Cave myotis bats. The bats emerge at sunset during the months of May through October, and viewing is open to the public.