A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

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

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

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

This stately Georgetown rowhouse was once the home of a 54-year-old diplomat and his 16-year-old bride.

A small token of gratitude from freezing cold journalists who were given a warm haven while covering JFK's inauguration.

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.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

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

A professional special effects makeup artist’s collection of horror creatures and one-of-a-kind recreations on display in downtown Boulder City.

This massive home was constructed by one of the greatest conservationists in Colorado history.

Have a heavy metal Christmas at this bizarre Turkish-American restaurant.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

The Lone Star plaque hangs in a bombed-out bunker in Normandy to honor a Texan colonel's heroic actions on D-Day.

Explore an eerie, abandoned medieval citadel.

A French museum of wrought iron.

The woman who helped save 15th-century France was born in this humble home.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.