The 606 is a decade in the making.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A monument to the art of slicing people open.

Unable to build support structures on glaciers, the engineers for this tramway were forced to design a unique system.

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

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

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

Amsterdam's former hotspot for public executions and dissections.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

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

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.