This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Home to items never before seen by the public.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This giant Christ statue was a failed attempt by Indonesia to dissuade East Timor from demanding independence.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

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

One part local history, 99 parts gruesome haunted house.

This former coal gasification plant found a curious second life as a popular public park.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

Cannon designed to fire an atomic warhead.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Exact replica of the ancient monument, but much, much lighter.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.