Once upon a time, there was a huge amusement park along the river Spree. If you follow the Spree past the ‘Insel der Jugend’ in Treptower Park, you will all of a sudden see dinosaurs, weird creatures, pieces of fairground rides and finally a ferris wheel peeking out behind fences and trees that have grown to reclaim the abandoned amusement park.
It's a wonderful walk along the greener side of Berlin - and the less explored one also. Discovering left-over pieces of a socialist theme park and its rides definitely is a great past time for a lazy sunny afternoon!
For safety reasons, you cannot enter the park, but you’ll get a good impression from behind the fence.