Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

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

This mountaintop observatory is home to one of the world's largest reflective telescopes.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

A Spanish forest is filled with mysterious stone carvings.