The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

Be on the lookout for the symbolic insect all over the city.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Living towers made of people that are now recognized by UNESCO.

The Gaudí-inspired building that was the start of Terrassenc modernism.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

This imposing modern citadel started out as a home renovation project.

This cemetery features modernist statues as strange as its name.

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.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

One of Europe's largest supercomputers is housed inside of a disused chapel.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

Mountain where Jesus was first tempted by the Devil.

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.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.