The oldest operating pharmacy in the world features 800-year-old recipes.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

Pop culture has helped to keep this iconic British building from being destroyed.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The most visited, and possibly most controversial, museum in Germany.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The fairy tale castle of the "fairy-tale king."

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A whimsical bridge adorned with decorative dragons.

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

The "dragon babies" of southeastern Europe.

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

The glowing blue Nymphaeum of Emperor Tiberius.

Where Aleister Crowley taught magick in "La Chambre Des Cauchemars," his "Chamber of Nightmares."

Thousands of well-dressed mummies below a monastery.

Every inch of this chapel is covered in craftsmanship from across the world.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Cave shrine on Monte Pellegrino.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

Windblown rock formations in an ancient Roman quarry.