Pool at the bottom of a waterfall on the river La Grave. Park the car just past the bridge coming uphill (no official parking but offroad). Bit of a climb down into the gorge, on the left side close to the waterfall there is a slope that is not too steep and safe enough. Water is FREEZING cold but what a thrill! You can skinny dip but you might get an occasional tourist along the road.
This is a crowd-sourced map. Abilities vary, and conditions change. Always assess risks for yourself before getting in.
Be careful going down into the gorge, look careful, there is one 'path' to the left of the fall going down from the roadside, it has some gravel but plenty solid rocks for footholds.