Museum preserving torture methods from the past.

An ornate private entrance to the Vienna subway built specifically for the emperor.

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

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

The world's oldest known salt mine.

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

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

Artfully arranged bones of 5,800 Austrians.

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.

Macabre museum devoted to historical Viennese murders.

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

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

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This riverside restaurant has been serving customers since 1146.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

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

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

Remnants of an exploded schooner and wrecked submarines form a breakwater.

In 1830, cemetery workers in Cham unearthed a chamber housing thousands of skeletal remains from the 13th century, which can still be viewed today.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.