The only natural cave bath in all of Europe.

This abandoned Brutalist treehouse is a hidden architectural relic.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

One of only two places in the world where two rivers cross each other without the waters mixing.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Puppet theater and museum holding a collection of more than 300.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A fascinating insight into daily life in the Eastern Bloc.

Started as a kitchen garden, now the second largest botanical garden in the world.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This mountainside mural of a person carrying a torch was created for the 1994 Winter Olympics.

Citizens of Norway want to gift the peak of Mount Halti to Finland for its 100th birthday.

The grounds and buildings of an old wood pulp mill have been transformed into an innovative art park and museum.

Thousands of birds nest in the cliffs while arctic foxes prowl below.

An intricately carved Viking church overlooks a glistening fjord.

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

Thousands of miniature bronze sculptures have taken over this city square creating a unique art installation.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

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."

Art becomes an enchanting part of the environment at this wooded sculpture park.