A giant floating rubber duck-bunny painted with a different design every year.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

Where royalty waits in the height of luxury.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Europe's official "zero-level," the equator of elevation.

This subterranean studio is filled with fascinating kinetic art.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

A unique collection of gilded age mechanical pianos.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

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

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

Sound travels strangely in this underground whispering gallery.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

It's always game time at Stockholm's only museum devoted solely to video games.

A statue that stood at the center of a long copyright battle.

An abstract representation of weather in Sweden.