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

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

This former insane asylum now holds a pathological anatomy museum.

The beautiful baroque library of the Hapsburg empire.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

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

A breathtaking viewing platform over the Alps.

The world's oldest known salt mine.

An Austrian house of bones filled with hundreds of intricately painted skulls.

This 19th century cyclorama acts like an analogue time machine to a different era.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

The medieval network of canals hidden underneath the city is opened to explorers each year.

The amazing wonder cabinets of a very rich Austrian archbishop.

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

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

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

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

At this exhibit on the world of poison, venomous animals steal the show.

This strange statue features a bust of the famous composer plopped atop a woman's body.

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