Big Savage Tunnel
The Big Savage Tunnel is a rail trail tunnel located about 9 miles (14 km) southeast of Meyersdale, Pennsylvania. It, as well as the Pinkerton Tunnel, Borden Tunnel, and Brush Tunnel are part of the Great Allegheny Passage trail. It was originally built for the Connellsville subdivision of the Western Maryland Railway.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).