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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A surreal statue honoring Prague's favorite literary son.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

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

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

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

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The ritual has been performed uninterrupted for nearly 700 years.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The oldest operating roller coaster of its kind, the Montaña Suiza has been thrilling riders since 1928.