Corn-inthian columns with a uniquely American take on neoclassical architecture.

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.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Home to items never before seen by the public.

At 207 feet, one of the world's longest continuous escalators.

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

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

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

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

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

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

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

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

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

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

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

D.C. once had its own tiny rival to the New York Stock Exchange.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

A former major munitions plant that has been converted into a sprawling art space.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.