At the foot of craggy cliffs, an easy 1km walk from the village, the River Sorgue surges from the earth's depths. The spring is most dazzling after heavy rain, when water glows azure blue, welling up at an incredible 90 cu metres per second. Jacques Cousteau was among those who attempted to plumb the spring’s depths, before an unmanned submarine touched base (315m down) in 1985.
