Hideout of thieves, monks, and goat-footed gods.

An alchemist's "magic door" stands in the middle of a Roman park.

A open air theatre built on a cliff by an eccentric British woman.

A city built from mud and known as the "Manhattan of the desert."

A Turkish monastery tucked into a cliff wall.

A fifth-century temple improbably built into the side of a cliff.

A mysterious castle built as a monument to lost love.

Massive fortress bastions in the desert of Cholistan.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

The sign at the garden gate reads: "These Plants Can Kill."

Abandoned Nazi train station turned underground astroparticle laboratory.

This foolish Victorian sea fort was converted to a deluxe hotel.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

Tropical paradise strewn with hundreds of World War II wrecks.