Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

Ancient Greek oracle of the dead.

This German "living museum" is maybe a bit too immersive.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

This abandoned gold mine found a second life as a post-apocalyptic film set.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

An unusual resting place built into the hill with an amazing view of Lake Como.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This half-finished "city of toys" was almost Italy's own Las Vegas.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

A 16th-century horror show built in a lovely Italian garden.

Does this strange mural depict witches battling beneath a penis tree?

An unusual house built using an iso-elastic membrane.

This network of roads is one of the most unique Etruscan creations ever discovered.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The now-abandoned Fascist summer colony served a dark purpose during World War II.