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The 2000-m-long regatta course at the Langer See lake in Grünau was an official site of the Olympic Games 1936. The first rowing regatta took place here on 27 June 1880.
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Strandbad Wendenschloss
This public lido at Langer See which opened in 1915 offers a pleasant sand beach, an art exhibition, beach volleyball courts and a fantastic view onto the regatta course on the other shore.
An observation tower without an elevator in Southeast Berlin, from which you can see that there is a great deal of forest around Berlin. There is a cafe at the tower.
An open-air event in the old town of Köpenick that takes place every year for a weekend once in spring (around end of April) and once in summer (around August). Wineries from (mostly) Germany bring their wine which you get to enjoy at a moderate price. There are also food stalls.
The old town of Köpenick is surrounded by water. Especially noteworthy are the Köpenick Palace which houses a museum of applied art and the Neogothic town hall.