Historical Marker
Last Chance
Historical marker location:
3001 Connecticut Ave NW, Smithsonian National Zoo, District of Columbia
( Marker can be reached from Olmsted Walk, 0.1 miles east of Connecticut Avenue Northwest, on the left when traveling east.)
Oryx and gazelle reproduction programs.
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.