A Belgian self-built tower inspired by the Bible and ancient civilizations.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Lavish royal estate punctuated with heated greenhouses.

Walrus skulls and narwhal bones were found here while excavating a 900-year old church.

In a country where driving from one town to another is literally impossible, this small stretch of gravel is a remarkable feat.

One Greenland town turned itself into an open air sculpture gallery with the help of a series of traditional stone artworks.

A surprisingly beautiful abandoned World War II military base in East Greenland.

The world's northernmost flowers cling tenuously to life on desolate Kaffeklubben Island.

Small Island off the coast of Greenland.

The 3.8 billion-year-old rock proves that tectonic plates may have been shifting longer than we thought.

A miniatures park with a model of Wolf's Lair as it looked during World War II.

The majority of the highest mountain in Poland is actually located in a different country.

The two abandoned overpasses are among the largest bridges in Poland.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

The silly symbol for an underground protest group is now scattered around the city.

These massive moving sand dunes have swallowed an entire village and are still on the run.

A mysterious structure left behind on the Polish mountainside, sometimes called "Hitler's Stonehenge".

Naturally formed rock city in Poland.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.