This one-room museum is dedicated to Norwegian history and jokes.

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.

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

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This giant sculpture made of trash is a critique of society's wastefulness.

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.

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

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

This cathedral hides a sculpted dog that determines your fate and an unexploded shell from World War II.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Natural cathedral designed by Italian artist Giuliano Mauri.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A 16th-century horror show built in a lovely Italian garden.