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

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

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

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

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

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

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

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

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

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

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

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Home to items never before seen by the public.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

One of the best places in Florida to spot rare, carnivorous pitcher plants.

This now-deactivated naval base defended the Florida coast for centuries.

One Confederate statue that accurately reflects the ugliness of its subject.

This steamer is known as "The ship that built Cleveland."

Unique collection containing a wide and curious range of contraceptive items.