A fishing village arose in the southern part of the gulf of Oristano, in an extremely sheltered position, at the base of the 'horn-shaped' piece of land that ends at the charming Capo San Marco, the southernmost limit of the bay and the border with the Costa Verde. The typical dwellings of the small village, in the territory of Terralba, stretches as far as the pine forest of the salt water lagoon of Marceddì, which originated from the marine inlet. The internal part of the lagoon, separated by a small barrage, is a pond that goes by the name of Stagno di San Giovanni. The rivulets of Rio Mogoro and Rio Mannu enter here, making the water less brackish.