The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A unique seaside cave where Aleister Crowley faked his own death.