One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

Dedicated to one of the pioneers of Serbian football.

The figure atop this globe is from a Serbian play about a merchant's travels around the world.

This Late Gothic building that once housed Erasmus is now known as the filming location of "Suspiria."

Invented in the mid-19th century, this machine could send copied images via telegraph lines.

On the wall of this medieval square, a symbol of the Spanish Inquisition.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

This museum houses a large collection of old motorcycles.

One of Belgrade's most beloved animals.

What started as a collection of vintage tractors turned into a museum filled with cars, radios, and other oddities.

This open-air, narrow-gauge railway museum pays homage to the region's transportation history.

A brutalist gem towering over the heart of Milan.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

This tower is all that remains from a medieval fortress.

A sculpture of a blood drop designed to honor those that have donated the precious liquid.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Ruins of an old water tower that look like a horror-film castle.