A beautiful flooded sand quarry with exceptionally clean water, even towards the end of summer.
It's a great spot for a natural swimming experience. The water is amazingly clear and surprisingly warm, with a gradual descent that's suitable for smaller children. There are plenty of separate entrances to the water and space on the beaches for relaxation, sunbathing, or games. You can also have a campfire or even camp overnight.
Be aware that a part of the quarry is reserved for nudists and fishermen. The sign indicating this might be placed high up on a tree and easy to miss. The place can get crowded, so finding a spot might be a challenge during peak times.
It's possible to park your car right next to the water.