One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A hidden three-foot-wide house separates these two regal churches.

Houses are tucked between, on, and underneath giant boulders.

An architectural gem nestled into a promontory overlooking a prehistoric landscape.

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

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

A replica of the Roman emperor in glorious full color.

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

Seaside ruins of a settlement that date back to the first century B.C.

This enormous censer uses a pulley system installed over 400 years ago.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

Small-town scandal, transformed into timeless pop art

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

This panoramic lift provides a futuristic ride up San Pedro Mountain.

The oldest Roman lighthouse still in use.

Giant granite sculptures representing family on the northern coast of Spain.

The remains of an encyclopedic sculpture garden later used as an internment camp.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

Crumbling World War II-era gun emplacements still stand near lighthouses on the Spanish coast.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

An out-of-place grove of sequoias thrives in northern Spain.

An abandoned Indian-inspired mansion.

The spectacular geological formations make it one of the most impressive caves in Europe.

See replicas of Europe's most famous cave paintings and even some of the animals that feature in the art.