In prehistoric times, the Supramonte area was more densely populated than it is today, as attested by traces of at least 76 villages, 46 nuraghes, 14 dolmens, 40 Giants' graves, 17 holy wells and 3 megalithic walls. Notable archeological sites include the village of Serra Orrios (located slightly north of the northern edge of the limestone lands), which contained about 70 circular huts and two megaron-like temples, and the nuraghe village of Tiscali, located in a strategically high position between the valleys of Lanaittu and Oddoene.