Abandoned 18th century weapons factory in the Aezkoa Valley.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

The site of a legendary battle immortalized in medieval literature.

A landscape decorated with enormous skull sculptures.

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

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.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

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

The cave where Saint Genadio meditated and played chess.

This former power station is now a museum dedicated to the region's coal-producing history.

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

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

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

This Gothic church houses ornate royal tombs and a magnificent gilded altarpiece.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

A delightful museum devoted to the history of books.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.

This grand gothic brewery has been pumping out suds for over a hundred years.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.