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

Op-art architecture designed for happiness.

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

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

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

The topiary maze at the Habsburg hunting lodge.

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

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

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

The beautiful baroque library of the Hapsburg empire.

Island wonderland for communist autocrats.

The Renaissance-era courthouse is a relic from the fortified town's centuries of Venetian rule.

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

The world's largest frame offers spectacular views of the city's past and present.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.