Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

Op-art architecture designed for happiness.

Dine amidst exotic plants at this former royal greenhouse.

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

The beautiful baroque library of the Hapsburg empire.

The house that took a plunge into the facade of a museum.

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

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

German and American troops joined forces to defend this fortress during the strangest battle of World War II.

A three-shelf library serves as a memorial in the Jewish cemetery of Krems.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

Fantastic stories on a miniature railroad.

An ornate private entrance to the Vienna subway built specifically for the emperor.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

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

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

American soldiers discovered Europe's best one-liner at the end of World War II.

This cubist Vienna church building looks like some sort of alien stonehenge.

Macabre museum devoted to historical Viennese murders.

Austria’s oldest brewery makes beer with flaming-hot granite.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Gladiators once walked this ancient, subterranean passage.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.