An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This unattributed sculpture in Amsterdam is hiding in plain sight.

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

The European equivalent of the Hollywood Walk of Fame is slowly spreading over the entire city.

Devastated landscape used for hundreds of years by the Romans as their primary mining site.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

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

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

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

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Perhaps the most spectacular grotto along the Algarve coastline.

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

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

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

This abandoned fortress still stands guard over the Guadiana River despite a history of warfare.

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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

This ancient rock painting is the oldest evidence of humans’ love affair with honey.