Historical Marker
Hughes House
Historical marker location:
3003 O St NW, Georgetown, District of Columbia
( Marker is on O Street Northwest just west of 30th Street Northwest, on the right when traveling west.)
(c. 1859).
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.