The first green space constructed on an elevated viaduct.

This massive library holds what was once the largest book collection in the world.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.