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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The world's oldest known salt mine.

Op-art architecture designed for happiness.

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

The Habsburgs' royal collections of art and wonders.

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

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

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

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Each year melting snow turns these Austrian hiking trails into scuba zones.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

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

The beautiful baroque library of the Hapsburg empire.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The fairy tale castle of the "fairy-tale king."