The romantic botanic tunnel feels like a well-kept secret.

The world's largest collection of intentionally useless inventions.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

This spooky statue sits outside a famous Prague theater.

Countless grotesque faces stare out from this eerie Prague art wall.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A massive, abstract lookout tower providing a panoramic view of Prague.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

A floating underwater hotel, created by a Swedish artist.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

A man has revenged his true love's betrayal through tears and stone genitalia.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

Micro-nation based around a nine-story high illegally built tower.

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

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

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

The internet as provided by a James Bond villain.

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

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

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

Crooked windswept pines give this old forest an enchanted and magical look.