Just outside the small town of York-New Salem, Pennsylvania, along the York County Rail Trail lies the oldest continuously running railroad tunnel in the world. The Howard Tunnel, named for the young man whose idea it was to build the tunnel through a small mountain. The tunnel was built during the years of 1836-1837 and opened up in 1838. The 370 foot tunnel expanded to two rail lines in the 1870's.
On a somber note, the tunnel has seen 3 Presidential Funeral Processions. Presidents Lincoln, Harding and McKinley's bodies all have passed through the tunnel.