A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

The busy transport hub is home to the tallest airport slide in the world.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

This 16th-century mosque is the hallmark of the African architectural legacy in India.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A series of playful yellow penguins share a serious message about the environment.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This lucky bronze frog was gifted to Madrid by a casino.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

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

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.