An Engineering Marvel
Historical marker location:
874 Washington Boulevard, Columbia Island, District of Columbia
( Marker is on Mount Vernon Trail, 0.1 miles south of Arlington Memorial Bridge, on the right when traveling north.)
George Washington Memorial Parkway. National Park Service, U.S. Department of the Interior
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The District was originally much larger: The District of Columbia originally included land from both Maryland and Virginia, but in 1846, the portion of the District that had been taken from Virginia was returned to the state.