Deep into the lower floors of Pike Place, find a date with fowl fate.

Soldiers’ scrawls turned into history’s signatures.

This Pennsylvania structure, the oldest building in Gettysburg, was once a stop on the Underground Railroad.

Travel back in time aboard a restored 1950s-era railcar.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

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

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

There's a crumbling old mansion inside the Smithsonian National Zoo.

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

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The only Leonardo Da Vinci painting in the Western Hemisphere.

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

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

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

A secret greenspace hides atop a Capitol parking garage.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

This map, on display in the Library of Congress, and one of only seven known to exist, is the very first map of the United States.

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

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

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

The tunnel under the Capitol Building where Congress takes out its trash.

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

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