It lies on the hills that delimit the southern part of Campidano: from its location, the landscape reaches as far as the Golfo degli Angeli to the south and to the oasis of Sette Fratelli to the northeast. Sinnai is a town with 17 thousand inhabitants in the metropolitan area of Cagliari, historically founded on agricultural and pastoral activities and today on industry and on the tertiary sector. The olive-growing and wine-making and honey production are all still alive. The artisan tradition is focused on weaving reeds to make baskets and also on processing gold filigree, resulting in is prendas, splendid jewels. Women's dresses in precious fabrics are artistic: women’s mastery made them into works of art.

The vast and varied territory of Sinnai extends to the sea, from a portion of the splendid Torre delle Stelle to the tourist village of Solanas, more than thirty kilometres from the town, along the scenic road that leads to Villasimius. In Solanas, a long, wide beach of soft, golden sand is washed by waters reflecting every shade of green and blue.