This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

This bridge was constructed from the rubble of the infamous Bastille.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

One of the largest Roman settlements in Portugal.

The corpse bride of Portugal.

The "Little Ones," show Portugal in full miniature splendor.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

A cluster of granite granaries perched on stilts.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

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

A small Portuguese cottage formed between boulders in the countryside.

Picturesque intersection of witchcraft and ancient Christianity.