At All Hours

Historical marker location:

1058 Thomas Jefferson Street Northwest, Georgetown, District of Columbia

( Marker is on C&O Canal Towpath Northwest west of Thomas Jefferson Street Northwest, on the left when traveling west.)

Chesapeake and Ohio Canal National Historical Park

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.