One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Abandoned Nazi train station turned underground astroparticle laboratory.

Mysterious Spanish catacombs of unknown origins.

Of course Salvador Dalí lived in a castle...

Cliffside houses provide a spectacular view from their perch above the valley.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Week-long block party becomes a competition for the best decorated street.

Mountain where Jesus was first tempted by the Devil.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This semi-secret storybook hedge maze is also the oldest garden in the city.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

A sixth-century Byzantine cistern hidden below a modern carpet store.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A beloved carnival gets a modern makeover in Los Angeles.

From pre-war whiskey cocktails to prohibition-era speakeasy secrecy, this bar has seen it all.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.