Dine amidst exotic plants at this former royal greenhouse.

The beautiful baroque library of the Hapsburg empire.

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

The solemn exterior conceals an opulent interior of this 17th century church.

An exquisite Baroque church in Vienna's old town.

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

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

The patron saint of spinsters grasps a container of dried blood.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

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

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

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

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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

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

This automated sculpture of two men peeing will spell out text messages with their micturition.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.