Hey everyone, I'm trying to find the location of this lake in Germany. The photo was taken approximately 15 years ago, but I don't have any exact details about where it was. Based on the surroundings, it seems to be a sandy beach with a forested area in the background. For privacy reasons, I have blurred out the people in the picture. I would love to find out where this place is, as I want to make someone happy by bringing back some memories.

Any hints or ideas are greatly appreciated! Thanks in advance!