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

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

Once overlooking the town, this church now resides on a permanent tilt.

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

Enormous sandstone towers loom within a Czech forest.

Of all the houses that grace this neighborhood, only one is a testament to surreal architecture.

A striking, modern church devoted to a nun who loved God and beer.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

An unusual cave filled with rare alien-looking aragonite formations.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

A perfectly preserved hill village where the buildings are painted like white lace.

The world's newest astronomical clock is also its most accurate.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

One of the few cold geysers in Europe, its eruptions are powered by carbon dioxide.

Admire dozens of life-size animals made from old scrap metal, nuts, screws, and valves.

A musical instrument played by the sea.

Island wonderland for communist autocrats.

Longest fortress system anywhere in Europe.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

Humble beginnings for one of the world's most famous scientists.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.