Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A stunning architectural yet functional feat, towering over Oslo.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

This floating sculpture of ice is a poignant reminder of nature's power.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

A beloved local artist has been honored with this statue of a man emerging from a toilet.

The world's biggest floating museum in Gothenburg, Sweden.

A 200-year-old collection of medical paraphernalia in a historic house.

The lighthouse is on a island which is connected to another island, which is connected to another island, which is connected to one of the largest islands in the world.

The longest and tallest aqueduct in Britain can actually be sailed across.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

These crude contraptions were used to aid in the mining of lead, silver and gold.

This poignant WWI memorial looks like a lighthouse 100 miles from the sea.

The longest stone bridge in England has an impressive history that dates back over 700 years.

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

This lovely ancestral home inspired the author D.H. Lawrence, and features a tunnel made out of a living willow.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.