Historical Marker
A Monumental Legacy
Historical marker location:
100 15th St NW, The National Mall, District of Columbia
( Marker is at the intersection of 15th Street Northwest and Madison Drive Northwest, on the left when traveling north on 15th Street Northwest.)
The city was built on a swamp: The area that is now Washington, D.C. was originally a swampy, marshy region along the Potomac River. The construction of the city involved extensive drainage and landfill projects to make the land suitable for building.