where was this picture taken?
The Platzspitz in Zurick Switzerland where they tried a "legalize drugs" experiment. It became a killing field with dead bodies showing up in the park every other day for awhile.
They ended it because it was a complete failure.
http://www.nytimes.com/1992/02/11/world/amid-growing-crime-zurich-closes-a-park-it-reserved-for-drug-addicts.html