This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Notorious artist squat renovated into legal studios.

Abandoned railway line circling the city of Paris.

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

France's most famous cemetery, with some of its most curious tombs.

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

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Danish children are taught that Santa lives in Greenland, at this exact cabin.

1% of Greenland's entire population used to live in this single building, which is now slated for demolition.

Thousands of letters to Santa get delivered to this mailbox in Greenland.

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

Welcome to the greenest place in Greenland.

A remote Arctic museum focusing on the science of icebergs and the archaeology of an ancient Inuit settlement which lies just outside its doors.

Greenland's first shopping mall also hosts the country's government.

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

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

Neither bomb blasts nor heartbeats escape the giant ears of this super sci-fi Arctic outpost.

No longer the only, but definitely the oldest, fountain in Greenland.