An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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

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.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.

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.

A memorial dedicated to the famed North Pole explorer appropriately sits at the far edge of Arlington National Cemetery.

America's first federal monument.

This rudder is one of the few remnants of a shipyard that once operated on the banks of the Potomac River.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

A much-loved local landmark pays tribute to the shipbuilding past of this area.

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

One of London's lost rivers runs through a pipe over the tracks of this subway station.

This tribute to the fictional detective stands at the famous literary character's address.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A giant scrawl on the skyline of south London.

Once a 19th-century refuge for immigrants, this pub has hosted performances by Amy Winehouse and the Arctic Monkeys.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

This ancient Egyptian obelisk still bears the wounds of World War I.