This curious Tudor-era castle was once home to Napoleon's greatest adversary, the Duke of Wellington.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The first and only troll museum in Norway has interactive exhibits, friendly staff and a small gift shop.

World's strongest whirlpool.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

A cannonball fired during a war against Sweden is wedged in the wall of this old post office.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

This beloved wartime mascot has been honored with not just one, but two statues.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

A hands-off space for graffiti artists to hone and display their skills.

One part local history, 99 parts gruesome haunted house.

A gigantic mechanical bull rages over unsuspecting passengers at Birmingham’s central station.

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

The statue of a cursed knight is said to come to life every 100 years.

A Jenga-style cylindrical tower of books that appears to go on forever.