The unexpectedly beloved remnants of a controversial thermal power plant.

Long tunnels run under the ancient chariot racing circuit to the tower.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

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

This colorful statue welcomes visitors to a Barcelona park.

An early 20th-century bullring converted into a modern shopping center.

This cemetery features modernist statues as strange as its name.

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

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 temple to modernity, tucked away amid Barcelona's more well known museums.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A 12th-century fortress containing some of Berlin's oldest buildings.

Floating swimming pool within a moored vessel.

Where once there was a train station bathroom, there is now this German burger joint.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Thousands of flowers create enchanting pink tunnels over the city streets.

This lurid German fountain plots the sad course of marriage from dating to death.

An ornate century-old elevator still connects the two halves of Bad Schandau.