An ancient capital city that dates back 3,000 years old and harbors many surprises.

Rebuilt remains of a temple to Roman god Mithras.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

A cave covered with bizarre stalactites of cloth.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

The Avenue of Mausolea is a series of grand palatial tombs.

Huge standing stones mark a site of megalithic mystery.

A standing relief of a Norman knight whose posture marks him as a Crusader.

A submerged archeological park still holds the wonders of a Roman Sodom.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A sculpture that resurrected the only tree standing following the devastating 2011 tsunami.

Nine Gardens in one—with tea service.

Largest graveyard in all of Japan surrounds a famous mausoleum.

One of the world's largest ancient burial mounds.

A strange tribute to all the fallen souls of war.

The Hanshin Expressway goes right through its 5th, 6th, and 7th floors.

The self-mummified monks of Japan.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

The 10,000 Torii shrine.

Burial mound for the ears and noses of thousands of mutilated Korean soldiers.