Union Tunnel - Baltimore - was created in 1873.
Baltimore Harbor Tunnel was created in 1957.
Union Railroad of Baltimore was created in 1866.
Union Railroad of Baltimore ended in 1976.
Milford Tunnel was created in 1839.
Am Tunnel was created in 1993.
Mount Victoria Tunnel was created in 1931.
Sideling Hill Tunnel was created in 1940.
Cascade Tunnel was created in 1900.
Hægebostad Tunnel was created in 1943.
Yamate Tunnel was created in 2007.
Karisaka Tunnel was created in 1998.
Rya Tunnel was created in 2011.