This cubist Vienna church building looks like some sort of alien stonehenge.

Home of controversial poet priest who penned the words for the Austrian national anthem used in the 1930s.

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

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

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.

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

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

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

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

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

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

One man’s collection of photography books has transformed into a charming exhibition space.

Called the "Armenian Stonehenge," this ring of menhirs pierced with holes may be a prehistoric astronomical observatory.

Local legend says that whoever burns down this 2,000-year-old tree will only have seven days to live.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

Giant stone letters dedicated to the founder of Armenia's alphabet.

The luxurious circular mansion built for a Communist leader now lies abandoned.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.