The most emblematic piece by a Peruvian master of pop art ended up placed in a modest square in Alcorcón.

This small museum tucked within a subway station holds pieces from Madrid's past.

Commonly acknowledged as the only public monument to the Devil himself.

Likely the most colorful in the metro network, this mosaic was installed back in 1995.

This weathered-looking portal is actually an exact replica of the entrance to the building where King Philip IV of Spain celebrated his honeymoon.

After decades of neglect in a municipal storage unit this medieval jewel was given a new life in the late 1950s.

The sculpture of a man sitting in the middle of the square holds great significance for the young nation of Kosovo.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

What happens when you cross a mayor and a painter?

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

With remarkable nonchalance, this modest park in Alcorcón brings Greek mythology and astronomy together

This is Bremen’s oldest historic district, famous for its labyrinth of narrow medieval alleys lined with tiny, colorful 15th-century houses that resemble beads on a rope.

Tiki luxury on Nob Hill.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A Nesting Doll of Churches.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This modest lottery shop draws hopefuls all year long, but come Christmas season, lines wrap around the block.

A “floating horse” hangs menacingly over the heads of passersby.

The Torres Quevedo Museum offers a unique glimpse into the pioneering inventions this visionary engineer

Infamous and now demolished panopticon prison built by its former inhabitants.

This striking gate in Carabanchel is a modern expression of Madrid's centuries-old connection to bears, the animal that has symbolized the city for generations

The biggest outdoor modern mosaic in Madrid