Nature venue
Plötzensee
201 locals recommend,
Location
Berlin, BE
Tips from locals
For a run in the morning or a picnic and a swim later in the day (just hop the fence and go sit by the water)
a lot of locals are go there doing the hot days of summer. You have to pay if u want to go to the big beach, but you also can go to the free spots around the lake.
Plötzensee is a fairly large lake which is just about 5 minutes by bike. It is great to walk around or to take a dip into the water.