This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A fortress off the West coast of Portugal that dates back to 1502.

In Spain, the ruins of a Roman military camp sit along a flooded section of a river.

The ruins of a 16th-century bridge loom over Olivença's sovereignty.

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

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

This Gallo-Roman sanctuary is dedicated to Serápis, god of the underworld.

This impressive rupestrian engraving dates back to the Upper Palaeolithic period.

An 11th-century medieval castle cascades over the town of Numão.

One of the world’s longest pedestrian suspension bridges.

One of Europe's largest groups of dolmens remains largely off the typical tourist track.

Come for the bread-themed puppet show, stay for the buffet.

Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

This castle has links to Portugal’s founding and struggles for independence.

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

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

A submerged village appears when dam levels drop.

A cluster of granite granaries perched on stilts.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

This small chapel is built of human bones and decorated with a golden skeleton.

Dead weights honor the dead of Portugal's fishing industry.