A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

D.C. once had its own tiny rival to the New York Stock Exchange.

An overlooked memorial honoring the local Washington residents who died in World War I.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The national park was once a plantation estate.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

Washington's iconic carousel has a nice piece of Civil Rights history.

The oldest continuously operating fish market in the United States.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Decades before the scandal, this staircase on the river was a literal "water gate."

This poor little statue is the most vandalized memorial in Washington.

A much-maligned monument to teetotalism.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A historic neighborhood church is reborn as a psychedelic arts collective.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

This working class sculpture pounds his hammer all the livelong day.