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

A giant interactive periodic table with real samples of the elements.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

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.”

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

Countless grotesque faces stare out from this eerie Prague art wall.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Macabre astrological automaton clock dating to the late 1400s.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This vast, pristine wilderness is home to a rare subspecies of black bear.

A unique spiral staircase that doesn't quite make it up to the top floor.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A two-way chairlift system between Zugliget and the highest point in the city.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Museum dedicated to the terror regimes of Hungary.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.