Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

Caves famous for the dragon-slaying saint who lived there.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This garden houses the remains of the ancient Greek port of Marseille.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This massive blockhead sculpture hides an entire library.

A bookstore dedicated to the intersection of comedy and art.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

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

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

Barça football fans might see the insignia hidden in a church window as a divine sign.

A stately palace has been converted into the world's largest cannabis museum.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.