The final residence of an educator, civil rights leader, and presidential advisor was also the first headquarters of the National Council of Negro Women.

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

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

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

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

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

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

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

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

This statue of the "father of television" stands prominently in the United States Capitol.

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

A nostalgic bibliographic gem.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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

Taste the white whiskey that the United States' first president once distilled and enjoyed.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.