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

This colorful statue welcomes visitors to a Barcelona park.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

An Anatolian immigrant created his own little paradise in the shadow of the Berlin Wall, made possible by the tensions of the Cold War.

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

One of the best-preserved pieces of DDR propaganda in Berlin.

A wonderful museum dedicated to the local straw hat industry.

This red light district plaza memorializes the Fab Four and their historic connection to the area.

Hamburgers are intensely proud of their tunnel beneath the river.

Cages that once displayed the bodies of executed leaders hang from a German church tower.

This strange building looks like a medieval fortress crashed into a 1960s Brutalist office block.

Across Valencia lie the remains of three ancient fortifications built centuries apart: a Roman enclosure, an Islamic expansion, and a medieval Christian wall.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

After immigrating to Paris in the 1970s, two brothers from Laos built a grocery store empire.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Historic medieval fortified city in southwest France.

An eerie reminder to the horrors of World War II.

A faithful reconstruction of what was once the only window into Japan.

This statue of the "shiny uncle of Beppu" was erected in 2007.

Rumors and legends of secret Nazi activities surround this eerily remote island mansion.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.