Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

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

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

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

The personal charnel house of Anton Bruckner.

The shell of a medieval fortress offers commanding views of the area it once protected.

The world's oldest known salt mine.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The Habsburgs' royal collections of art and wonders.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

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

This museum promotes informed contraception by documenting its often secret past.

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

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

Artfully arranged bones of 5,800 Austrians.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

The resting place for anonymous victims of the Danube's dark waters.

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

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

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 final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.