17,400 lbs., 12 feet in diameter, and 29 years in the making.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This semi-secret storybook hedge maze is also the oldest garden in the city.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A beautiful but toxic fountain of mercury.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Week-long block party becomes a competition for the best decorated street.