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

Through the decades, Black music stars have performed at this historic hub for music and the arts.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

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

A rotating cast of guys and dolls in front of a Washington, D.C. building.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

The most decorated dog of World War I is preserved in the Smithsonian.

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

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

Daily lunch spot for many of Washington, D.C.'s cab drivers.

A computer bug so primitive it was an actual insect.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

A large instrument played by the wind.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A sign marks the plane crash that caused two nuclear bombs to fall in North Carolina.

Divinely-inspired village houses 6,000 dolls, plus strange and lovely outsider art.

The only pachinko parlor in the United States.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

Staves, storm-calling, and of course, necropants.