The fairy tale castle of the "fairy-tale king."

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

The only medieval bridge in Britain with its defensive tower still in tact.

A little sculpture with a large wardrobe.

Theme park featuring miniature replicas of European monuments.

This colorful statue welcomes visitors to a Barcelona park.

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

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

The first park built over a freeway is a brutalist masterwork.

A wall of chewing gum moonlights as collective art.

Climb inside an iron crystal magnified 165 billion times its normal size.

The longest hedge maze in the world.

Fascinating town where normal life interfaces with the occult.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

Former villa and estate of James Deering developed to preserve native tropical forests.