An exquisite Baroque church in Vienna's old town.

Op-art architecture designed for happiness.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

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

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

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

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

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

The final resting place for the remains of 143 Habsburg royalty.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Baroque celebration of the end of the Great Plague of Vienna.

Legends surround an ancient tree trunk riddled with nails for good luck.

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

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

Macabre astrological automaton clock dating to the late 1400s.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

An existential riddle in the world's largest ancient castle.

A surreal statue honoring Prague's favorite literary son.

This doorless 20th-century elevator doesn't stop or slow down.

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