This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

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.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This chimerical bridge/tunnel appears to dead end right into the sea.

The world's first combination ski slope and power plant.

Copenhagen's celebrated theme park and gardens.

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

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Hamburgers are intensely proud of their tunnel beneath the river.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

Europe's first floating restaurant is home to a hilarious legend.

A beautifully eclectic mix of architectural styles.

A unique collection of gilded age mechanical pianos.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

A set of seven houses, each built in a style that represents a European country.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

A little sculpture with a large wardrobe.

When you're a great Russian Tsar, even your vomit gets a statue.