6 Logan

Historical marker location:
6 Logan Circle Northwest, Logan Circle, District of Columbia
( Marker is on Logan Circle Northwest north of P Street Northwest, on the left when traveling south.)

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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.