The ruins of an ancient stadium that hosted gripping chariot and horse races.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

A lush indoor jungle fills this bustling Madrid transportation hub.

Two 2,500-year-old Phoenician boats found on the coast of Spain, giving incredible insight into the ancient maritime traders.

This bazaar is one of the oldest in the Arabian world.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Salt is slowly eating away this abandoned saltworks town in the desert.

This impressive tunnel was dug entirely by hand over the course of 36 years.

The liveliest ghost town in the state.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

One of the most unusual geological features, recognizable from a dozen hit movies.

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

"Only the devil could play golf here."

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

The location of the last stand of Charles Manson's doomsday cult.

This old mining town, deep in the California desert, has a year-round population of one.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

An unusual round church in London with a Templar past.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Two stone columns flank the grand Venice square, but there were supposed to be three.