For a brief time in 1960s France, families could climb into a tiny submarine and be pulled along an underwater journey.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

Naturally protected city carved from a rock face.

Submerged lava formations create incredible waterworks.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

An enormous Buddha peers through a gap in its ruined chamber.

Abandoned 18th century weapons factory in the Aezkoa Valley.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

Eclectic final resting place of the controversial explorer.