A breathtaking viewing platform over the Alps.

The world's most important buildings shrunk to a tiny size.

This outsider art house has gone from clinical creation to astounding artwork.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

Fantastic stories on a miniature railroad.

"World machine" built by an untrained Austrian farmer.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

The world's oldest known salt mine.

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

The world's largest collection of intentionally useless inventions.

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

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Ride a dragon train into a world of dwarves.

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

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

Op-art architecture designed for happiness.

A spherical "micro-nation" in the heart of Vienna.

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

The beautiful baroque library of the Hapsburg empire.