With a vision as vast as the resource it uses—the sky of Sierra Morena—the cooperative project Cielos de Andalucía was born, offering astrotourism in the largest certified astronomical reserve in the world, covering 67 municipalities. Additionally, it is creating synergies with other cultural and environmental tourism activities in the participating regions, in the northern areas of Huelva, Sevilla, Córdoba, and Jaén provinces. This initiative promotes sustainable development, made possible through the involvement of the local population and five Andalusian Rural Development Groups.