These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

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

The world's oldest known salt mine.

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

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

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

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

Sturdy scales are a surprising thing to find in a modern European city.

These relics of the city's past now exist as a prominent modern feature.

One of Vienna’s oldest (and perhaps most haunted) alleys, allegedly with a bloody past that gave it its name.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

Designed as a reminder of one of the darkest moments in Austrian history.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

The solemn exterior conceals an opulent interior of this 17th century church.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

Op-art architecture designed for happiness.

Macabre museum devoted to historical Viennese murders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

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

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

Step into Narnia at this small park featuring statues from "The Lion, the Witch, and the Wardrobe."