A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This tower once served as a radar station during the Cold War.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

Some 4,000 individual tiles make up this striking blue billboard from the golden age of air travel.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

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

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

This giant sculpture made of trash is a critique of society's wastefulness.

This star-shaped military outpost is now simply trying to protect itself from neglect.

You can cross from one country to another in a single hop on this little bridge.

Elaborate tile work in this railway station tells the story of Portugal.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

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

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

Picturesque intersection of witchcraft and ancient Christianity.

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

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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

Images of neighbors past and present guard the streets of this charming alpine village.