This open-air museum filled with 19th-century buildings offers a unique view of historic craftsmanship.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

During World War II, Austria's oldest salt mine was used to store thousands of pieces of stolen artwork.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

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

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

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

A breathtaking viewing platform over the Alps.

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

The amazing wonder cabinets of a very rich Austrian archbishop.

This museum is dedicated to the little known ancient Roman history of Vienna.

"World machine" built by an untrained Austrian farmer.

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

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

A magnificent collection of imperial armor and weaponry.

Visitors dip into a variety of pools of what was once ice.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

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

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

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

The Habsburgs' royal collections of art and wonders.

One of the best collections of wax anatomical models in the world.