The only theatre in the world constructed specifically for sound movement.

Geological storytelling.

An outsider folly near Madrid.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A controversial art piece that harkens back to local folklore.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

A historic Christian shrine nestled within a spectacular natural cave.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

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

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

Historic medieval fortified city in southwest France.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Abandoned railway line circling the city of Paris.