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

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This abandoned villa of makeshift buildings was once the home of dancer Elis Sinistö.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

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

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

Menacing or in memoriam, the Silent People and their meaning are left to interpretation.

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

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

This isolated island is often capped by its own fluffy cloud.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

A walkable map of the world, made from soil and stone by one man.

A church of bones, decorated with 40,000 human skeletons.

The world's most important buildings shrunk to a tiny size.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The beautiful baroque library of the Hapsburg empire.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

Some of the smallest works of art in existence.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A breathtaking flower tunnel bursts with beautiful golden blossoms.