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

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

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.

Double spiral staircases are not unheard of, but they are very rare.

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

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

Op-art architecture designed for happiness.

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

Each year melting snow turns these Austrian hiking trails into scuba zones.

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

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 beautiful baroque library of the Hapsburg empire.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

Hungarian self-built castle.

A beautiful display of nearly 50 bells crafted with a unique design and distinct sound.

"Medieval" castle built in the mid-20th century by one family.

The last bastion of Roman presence north of the Alps looms over a German town.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The great Danube river starts here.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

A miniature train-ride through Slovenia's largest cave system.