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

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

During Prohibition, the U.S. Congress had an "official" bootlegger, with his own Capitol Hill office.

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

The school tested mustard gas for the U.S. Army during World War I.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

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

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

Perhaps the most scandalous statue of America's first president.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The "lovely red Vega" of the legendary record-settling pilot.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

There’s a hidden military meme engraved on the World War II Memorial.

People escaping slavery may have hidden inside a corpse vault.

A computer bug so primitive it was an actual insect.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

The house where John Wilkes Booth conspired with his co-conspirators.

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

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

The walls of the iconic dome are hollow and have a secret stairway.