Cala d’Ostia is found in the locality of Santa Margherita in the municipal area of Pula. The beach is made up of a base of light coloured sand mixed with gravel, and has rocks and stones of various sizes, with water that becomes quite deep. It is a small bay characterised by splendid tonalities of the sea and by rich plant life: posidonia, eucalyptuses and wild pines, all watched over by a nineteenth-century lookout tower built near the ruins of another built in the Spanish epoch. The beach is found in the vicinity of the archaeological zone of Nora, a town founded by the Phoenicians between the 9th and 8th century B.C., the oldest - it seems - in Sardinia. The archaeological area is found at the foot of the promontory of Capo di Pula. many treasures remain visible in the site. the mosaics, the town lay-out with thermal baths, temples and a theatre of the Roman era.