The tallest lighthouse in the Nordic countries was also the site of a bloody World War II battle.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

Hidden deep in a forest is this geological wonder carved by glaciers.

This fantastical icy castle is built anew every winter.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

A subterranean house of worship carved right out of the bedrock.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This sea stack in Cyprus is traditionally seen as the birthplace of the goddess Aphrodite.

Legend holds that the Ancient Greek goddess of love once bathed in the waters of this grotto.

The animals wander freely amid this gorgeous stretch of nature.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

The water here is so clear you can see the mysteriously sunken ship from the surface.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

Because sometimes you need to make a batch of frites even when the stores are all closed.