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

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Copenhagen's celebrated theme park and gardens.

Crystal chandeliers brighten up this dark underpass.

A collection of trees from various corners of the world call Stockholm University home.

This unique sculpture is often overlooked by pedestrians.

Stockholm's last remaining paternoster elevator.

Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.

Frequent fliers welcome in this airplane hotel.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

A Japanese video game arcade hides in the back of a Swedish pool hall.

A golden egg-shaped sauna in the Arctic tundra.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

The internet as provided by a James Bond villain.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

Sweden's "good old days" painstakingly re-created in a model village.

This Stockholm light tower can be controlled by anyone with a smartphone.

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

It houses the remains of a 17th-century version of the Titanic.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.