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

Macabre astrological automaton clock dating to the late 1400s.

The location of the world's first telescope demonstration.

This small Slovenian town has become a magnet for microbreweries.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

A Christian retreat founded to welcome refugees fleeing from the Nazis during World War II.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

The prototype for all Nazi concentration camps.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

This strange statue features a bust of the famous composer plopped atop a woman's body.

The site of Austria's biggest concentration camp now honors its victims.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

Narrow-gauge railway with its own personal power grid.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.