A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

The rogue roots are gradually consuming some of the historic marble grave markers.

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

This unique historical monument features large concrete spheres designed to resemble fallen stars.

Though his role as the inventor of baseball may be up for debate, fans still festoon Doubleday's grave with baseballs.

Recorded as the first person buried in Arlington Cemetery.

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

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.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A super-sized promotional trick that is now a D.C. landmark.

A historic neighborhood church is reborn as a psychedelic arts collective.

This lovely pocket park is one of the most under appreciated in D.C.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The oldest continuously operating fish market in the United States.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Right next to departures—how convenient!

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.