The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Morocco's largest Jewish cemetery.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Home to drunken tower-climbing goats... seriously.

A Prada store in the West Texas desert that is never open for business.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

A house carved into a rock in the 1940s.

The mark of the Devil's horns on a marble column in Milan.

Flamboyant architecture from the turn of 20th century.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

One part antique store, one part curiosities hodge-podge.

Step inside Lucy, the world's largest "elephant."

What better place to take a seat?

A medical facility that has been kept frozen in time.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.