In the location's words:

Check out the Liepnitzsee, a hot spot in the north of Berlin! Here you can cool off and enjoy the clear water. The lake is surrounded by dense forests, perfect for a relaxing break while hiking or cycling. Chill out on the shore or venture onto the water for a paddle or a swim. Pack your friends and make yourself comfortable for a day full of fun and pure nature at Liepnitzsee!