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.

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.

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

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

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

Decades before the scandal, this staircase on the river was a literal "water gate."

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

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

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 innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

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

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

Dedicated to a colonial woman who was hanged for being a Quaker.

No one messes with the Massachusetts sacred cod, not this time...

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

These items are all that remain from the room used by the author during his second tour of the U.S.

This statue intended for children to enjoy became a minor political spat.

Dedicated to one of the darkest moments in Irish history.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.