More then twenty urban paradises are hidden behind the nineteenth century houses of Amsterdam West. On Saturday June 9 these green gems will be open for public between 10:00 AM and 17:00 PM. Discover these green pearls, go for a treasure hunt and enjoy. There's also a lot to discover and todo for children. Passe-partouts with a map are available at start-points (cost € 2,50, children free).