A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A spherical "micro-nation" in the heart of Vienna.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

Macabre museum devoted to historical Viennese murders.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

This former insane asylum now holds a pathological anatomy museum.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Dine amidst exotic plants at this former royal greenhouse.

Visiting this café is like visiting the Austrian grandma you wish you had.

This museum promotes informed contraception by documenting its often secret past.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Strange rumors surround the artist who created these solemn metal guard dogs.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

This abandoned Slovenian military barracks has become a punky-political art squat.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This massive subterranean fissure is known as the "underground Grand Canyon."

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.