Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A sculpture of the beloved author surrounded by characters from his fairy tales.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

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

A public work of art that also provides some relief from the summer heat.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

A pair of connected skyscrapers form this symbolic gateway.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The silly symbol for an underground protest group is now scattered around the city.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.