-
Tuscarora Mountain Tunnel western portal
-
Kittatinny Mountain Tunnel [02]
![Kittatinny Mountain Tunnel [02]](../../../i/upload/2024/07/15/20240715141344-fd6f497d-cu_s9999x250.jpg "Kittatinny Mountain Tunnel [02] (3392 visits) Western portal of the Kittatinny Mountain Tunnel, one of four tunnels on the Pennsylvania Turnpike m...")
-
Kittatinny Mountain Tunnel [01]
![Kittatinny Mountain Tunnel [01]](../../../i/upload/2024/07/15/20240715141346-ee46943a-cu_s9999x250.jpg "Kittatinny Mountain Tunnel [01] (3266 visits) Western portal of the Kittatinny Mountain Tunnel, one of four tunnels on the Pennsylvania Turnpike m...")
-
Western portal of Blue Mountain Tunnel
-
Tunnel portal outside Addison Road station
-
Winchester and Potomac Railroad Bridge [01]
![Winchester and Potomac Railroad Bridge [01]](../../../i/upload/2024/07/17/20240717230005-0dbdd68e-cu_s9999x250.jpg "Winchester and Potomac Railroad Bridge [01] (4146 visits) The Winchester and Potomac Railroad Bridge, now operated by CSX Transportation, which carries the CS...")
-
Winchester and Potomac Railroad Bridge [02]
![Winchester and Potomac Railroad Bridge [02]](../../../i/upload/2024/07/17/20240717230009-a3433d63-cu_s9999x250.jpg "Winchester and Potomac Railroad Bridge [02] (3943 visits) The Winchester and Potomac Railroad Bridge, now operated by CSX Transportation, which carries the CS...")
-
Winchester and Potomac Railroad Bridge [03]
![Winchester and Potomac Railroad Bridge [03]](../../../i/upload/2024/07/17/20240717230012-c7d0b2e5-cu_s9999x250.jpg "Winchester and Potomac Railroad Bridge [03] (4530 visits) The Winchester and Potomac Railroad Bridge, now operated by CSX Transportation, which carries the CS...")
-
Winchester and Potomac Railroad Bridge [04]
![Winchester and Potomac Railroad Bridge [04]](../../../i/upload/2024/07/17/20240717230101-0e89deb5-cu_s9999x250.jpg "Winchester and Potomac Railroad Bridge [04] (4177 visits) The Winchester and Potomac Railroad Bridge, now operated by CSX Transportation, which carries the CS...")
-
DC-Maryland border
-
40th Street trolley portal
-
Monitor-Merrimac Memorial Bridge-Tunnel [01]
![Monitor-Merrimac Memorial Bridge-Tunnel [01]](../../../i/upload/2025/02/18/20250218235632-5aef878d-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [01] (1962 visits) North portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [02]
![Monitor-Merrimac Memorial Bridge-Tunnel [02]](../../../i/upload/2025/02/18/20250218235637-581fbcca-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [02] (1936 visits) North portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [03]
![Monitor-Merrimac Memorial Bridge-Tunnel [03]](../../../i/upload/2025/02/18/20250218235642-270961d8-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [03] (1961 visits) North portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [04]
![Monitor-Merrimac Memorial Bridge-Tunnel [04]](../../../i/upload/2025/02/18/20250218235648-fca8ade5-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [04] (2001 visits) North portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [05]
![Monitor-Merrimac Memorial Bridge-Tunnel [05]](../../../i/upload/2025/02/18/20250218235653-19c3fdef-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [05] (1971 visits) North portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [06]
![Monitor-Merrimac Memorial Bridge-Tunnel [06]](../../../i/upload/2025/02/18/20250218235658-5bb810e5-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [06] (1953 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [07]
![Monitor-Merrimac Memorial Bridge-Tunnel [07]](../../../i/upload/2025/02/18/20250218235704-55afa576-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [07] (2027 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [08]
![Monitor-Merrimac Memorial Bridge-Tunnel [08]](../../../i/upload/2025/02/18/20250218235709-560750da-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [08] (1971 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [09]
![Monitor-Merrimac Memorial Bridge-Tunnel [09]](../../../i/upload/2025/02/18/20250218235714-45502513-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [09] (1924 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [10]
![Monitor-Merrimac Memorial Bridge-Tunnel [10]](../../../i/upload/2025/02/18/20250218235719-11c76977-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [10] (1968 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [11]
![Monitor-Merrimac Memorial Bridge-Tunnel [11]](../../../i/upload/2025/02/18/20250218235725-ef9b2fb8-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [11] (1977 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")
-
Monitor-Merrimac Memorial Bridge-Tunnel [12]
![Monitor-Merrimac Memorial Bridge-Tunnel [12]](../../../i/upload/2025/02/18/20250218235731-5172cc89-cu_s9999x250.jpg "Monitor-Merrimac Memorial Bridge-Tunnel [12] (1965 visits) South portal island of the Monitor-Merrimac Memorial Bridge-Tunnel, a 4.6 mile long crossing of Hamp...")