Triceratops horridus

Historical marker location:

1025 Madison Drive Northwest, The National Mall, District of Columbia

( Marker is on Madison Drive Northwest west of 7th Street Northwest, on the right when traveling west.)

Bronze cast of prototype, USNM 517431

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.