This abandoned five-star hotel is now a five-star urban exploration destination.

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

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

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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

The 20th-century church looks like a rustic version of the Sagrada Familia.

A small house in Tazones, completely covered in shells.

A series of well-preserved ruins show the culture of the ancient Benehoaritas people.

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

Peek into a cave of giant, glimmering crystals.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

An early 20th-century bullring converted into a modern shopping center.

Wonderland replication in progress by one persistent man.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

A lush indoor jungle fills this bustling Madrid transportation hub.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Little-known artist couple chose a former silk factory as the location for a museum dedicated to their work and other avant-garde art.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

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