The Nieuwe Meer / De Oeverlanden is a recreational area at a small lake just outside the city centre of Amsterdam. In summer you can bathe in the sun and swim in the lake.
On the other side of the bicycle path there is the clothing optional area. Here naked sunbathing is allowed. The small forest is the biggest cruising area in Amsterdam. 24x7 cruising here. Park your car at the nearby official car parks.
When cruising at night be very careful. Also make sure to stay in the area. Nudity outside the cruising area is fined.