This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

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

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Man-made geyser that rises to the exact height of the Gateway Arch.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A hollow cement depiction of time's inexorable effect on the human body.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

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

Home to items never before seen by the public.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

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

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

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

This lovely pocket park is one of the most under appreciated in D.C.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A secret greenspace hides atop a Capitol parking garage.

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

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

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

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

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

This old abandoned sign flickers to announce a motel that isn't even there.