Enjoy coffee and cake while viewing antique medical equipment at this unique cafe.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A natural wonder in south Denmark.

Sweden's oldest animated sign is still lighting up the skyline today.

Stockholm's narrowest alley is barely over two feet wide.

A wooden street sign is the last remnant of this 400-year-old alleyway.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

This traffic circle in a small Swedish town is adorned with a statue of a giant potato.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A golden egg-shaped sauna in the Arctic tundra.

This Stockholm art museum integrates many of its pieces into the surrounding outdoor areas and natural landscape.

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This little jewel of post-war religious architecture is hidden inside the Diocesan Museum, which swallowed it when it was built.

This 19th-century fountain features sculptures of little gnomes that help with chores.

Life-sized bronze statues of fictional puppet characters.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

Rainbow arches made of shipping containers grace the entrance to one of France's largest seaports.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

One of only two commuter aerial tramways in the United States.

The highest rapid transit station in the world.

This Parisian café sticks almost exclusively to an ethos of reuse.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.