The ENS of Sillans is a Sensitive Natural Area whose natural and landscaped heritage accounted for the purchase of 367ha of natural lands by the County Council of the Var from 1989 and 1992. A Departmental Property whose objective is to preserve the natural heritage and make it accessible to the public. Some significant improvements have been carried out to allow the public access to the belvedere opposite the waterfall in total safety. Sillans la Cascade is classified as "natural heart".