Every Tuesday, students let off steam by screaming into the night air.

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

A former suicide bridge is now accumulating symbols of love instead of a body count.

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

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

"Only the dead get off at Kymlinge."

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

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

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.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

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

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

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

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

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

The library's graceful rotunda is like a bibliophile's temple.

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

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

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

Legend says the building's unusual features were added at the request of a paranoid president.

This Mexico City subway station will make you feel like you've been transported to the London Underground.

Its incredible collections are dedicated to preserving Mexico's film history.

Mexico City decorates its facades with extravagant floral arrangements every year.

The underground mall's skylights look like they could be part of a spaceship.