Underneath this small church are 15,000 bones, arranged by an obsessive academic.

A golden egg-shaped sauna in the Arctic tundra.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

The world's largest model of our planetary system.

Stockholm's deepest subway station is also a stunning ecological wonder.

In the Hugging Tree Forest, lingonberry marshmallows, hot chocolates, and the best campfire lattes north of the Arctic Circle come to you.

These coffin-like Brutalist balconies were inspired by a nearby mine.

A Swedish farm is the world's only producer of the rare, creamy delicacy that is moose cheese.

This small town's local tradition is to create the world's tallest ice pillar.

The world’s largest knitted mitten is displayed in one of Sweden’s smallest Arctic villages.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

A tiny village is home to the world's only diner completely devoted to the many varieties of traditional Swedish dumplings.

The world's first purpose-built indoor shopping mall opened in Sweden in 1955.

A lush indoor jungle fills this bustling Madrid transportation hub.

Sometimes called the Banksy of Madrid, Muelle was a pioneer of street art in the Spanish city.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

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

A spherical "micro-nation" in the heart of Vienna.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.