A welcoming, scenic plateau has seen various civilizations succeed each other over thousands of years, starting from the Neolithic period. The village of Iloi - pre-Nuragic, then Nuragic - is located at a height of 270 metres and it is probable that the people who inhabited it controlled the territory, which was crossed by numerous rivers at the time. It is also very probable that they celebrated mysterious rituals there and it is certain that they buried their dead there, leaving precious traces. The site, now an archaeological park, is just two kilometres from Sedilo and dominates the ancient Tirso river valley, with a panoramic view of the northwestern shore of Lake Omodeo.
The complex nuraghe takes centre stage inside the park, a construction with three towers, with a trapezoidal body leaning against it, which perhaps represents the original core of the structure, to the point of assuming that it was a corridor nuraghe, dating back to between the end of the Early Bronze Age and the beginning of the Middle Ages. The trefoil building, on the other hand, was built in several phases, up to the Late Bronze Age, and has a concave-convex shape.