A real-life "hobbit" cave in Flores, Indonesia.

Where cemeteries are carved into the side of cliffs and infants are buried in the hollows of trees.

This Indonesian village was revitalized by a vibrant rainbow paint job.

Some claim these desert ruins are from the legendary "Atlantis of the Sands."

Sacred waters rescued from the wrath of a volcano.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Tower that was a frequent stop on the travels of King James I.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

An independent naturist colony amidst 1000-year-old ruins.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

The ruins of a bombed medieval village memorialize the destruction of the Spanish Civil War.

Huge hole looks down onto an underground beach populated with sea lions.

A sixth-century Byzantine cistern hidden below a modern carpet store.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

In oil-rich Azerbaijan, people bathe in the black stuff.

Small church on top of a huge rock column.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Ancient rock-hewn town that witnessed key events of Georgian history.

Underground monastery and fortress.

17th century palace once a meeting place for politicians.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A medieval church built up to defend its village.

The growing stones of Romania.

Gigantic Romanian salt mines used to heal respiratory conditions.