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

The blowhole bursts spectacularly right next to the buildings in a medieval seaside town.

A house covered entirely with shells.

This art installation at an abandoned lipstick factory has distinct anti-capitalist vibes.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

Eccentric sculpture garden brings Basque mythology to life.

Salaguti's live-in museum: a fortress against criticism and consumer art.

Two large eyes painted anonymously on a mountain overlooking the city pay homage to an old legend.

A controversial art piece that harkens back to local folklore.

Hundreds of preserved dinosaur footprints can be found along a hiking trail in this small village.

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

Holding the current title of "biggest chair in the world," it stands with little fanfare in Lucena, Spain.

An independent naturist colony amidst 1000-year-old ruins.

An old wool-washing house filled with Fluxus contemporary art.

Archaeological site of Iberian people ruins.

This Bronze Age man spent millennia buried in a mine, giving his bones an eerie hue.

This beautiful spit of land was once the summer playground of the king of Spain.

The surviving remnants of a destroyed medieval church now stand in a public park.

A dictator's failed public works project has been reborn as two linked trails through spectacular scenery.

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

This enchanting green space houses a labyrinth lined with toxic plants.

Shrapnel, dynamite, bullets and Franco couldn't destroy this bust, rescued and kept hidden as a family secret for over 40 years.

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