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Landmark: Earth
Tunnels
Passageways dug through mountains, under rivers or underground that are used to travel from one point to another.
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Named for John Hollis Bankhead, an Alabama politician and U.S. Senator, the tunnel was built in sections and floated to the proper positions, then sunk. It opened to the public on February 20, 1941.
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The tunnel is 6,500 feet long and was bored from 1870 to 1872. The legend of the race between John Henry and the steam powered drill began here. It is said that his ghost haunts the tunnel.
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The 1.4-mile, four-lane tunnel handled its first vehicles in November 1957. Today, traffic at the Harbor Tunnel totals nearly 23.6-million vehicles.
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The Howard Street Tunnel took four and a half years to build and at 1.7 miles was the longest tunnel in the B&O system. Now operated by CSX Transportation, the tunnel is part of the principal rail freight line from Baltimore to Philadelphia.
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Part of Virginia's I-664, the 4.6-mile Monitor-Merrimac Memorial Bridge-Tunnel includes a four-lane tunnel that is 4,800 feet long, two man-made portal islands, and 3.2 miles of twin trestle. It cost $400 million to build.
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