This island hill is strewn with boulders carved by shipwreck victims from the age of sail.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

William Faulkner kept his beloved estate wild and untamed.

Colloquially known as "the lynching memorial," this is the United States' first memorial to the victims of racial terror at home.

Once one of the largest producers of pig iron in the world.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

A striped 12th-century basilica sits in the countryside of Sardinia.

Mysterious tombstones thought to be remnants of Atlantis.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

Before Nixon, "watergate" meant canals.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

An 18th-century townhouse that once hosted guests of the president.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The site of the climactic scene from the classic horror film is now a historic landmark.

This historic boathouse was constructed using salvaged lumber from burned barns.

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

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

The national park was once a plantation estate.

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

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The romance of early commercial flight still fills this Art Deco destination.