This is a great green infrastructure of a supra-municipal nature, 30 km long, which connects the towns of Huelva, Aljaraque and Gibraleón, and brings them closer to the great environmental, scenic, botanical, zoological and heritage wealth that encompasses the vast protected natural area of Marismas del Odiel that surrounds them. The main objectives are non-motorised accessibility between the three towns mentioned above by means of a multimodal road along the edge of the northern estuary of the Odiel; and the requalification of the degraded urban-rural edges.