The Vaccarès pond, brackish water, is located in the center of the Camargue National Nature Reserve and the Rhone delta. Because of its depth, 1.50 m and its area, about 6 600 ha, it is the deepest pond in Camargue but also the largest. Depending on the time of year and the weather, the light changes and the colours vary. Surrounded by the Petit Rhône, the Grand Rhone and the Mediterranean Sea, it is nicknamed "the Grand Mar".