The resting place of a Civil War celebrity's amputated limb.

This old-fashioned carhop restaurant gave the world the waffle cone.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

An alternate history park where the Union Army loses the war... to dinosaurs.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This museum sits on the site of a decommissioned military communications base.

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

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

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

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.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

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

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

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

This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

Every drop of D.C. tap water flows through this old waterworks.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A building shaped like the Army Corps of Engineers logo, because why not?

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

This is the oldest Roman-made bridge in the city still existing in its original state.