The crumbling remains of Juneau's explosives storage site.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This two-room shotgun shack in Tupelo is the birthplace of a King.

One of the most important yet well-hidden museums dedicated to the history of medicine.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

A Belle Epoque bordello turned into a themed love hotel.

A magical, macabre wax museum, beloved by locals, uses real artifacts to depict an assassination from the French Revolution.

An unusual number plate signifies the building's saucy past.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

A fairy tale castle in modern Rome.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The mystic whose incorrupt corpse still attracts the faithful.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

One of seven Jewish catacombs in Rome and one of only two open to the public.

This legendary city has been a tourist attraction for centuries.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.