When you reach the summit of the ridge on which it stands, at the end of a trek through secular trees, you will feel like you are both embracing and dominating the surrounding area, a breath-taking view from the Gennargentu massif to the Sette Fratelli park. The Adoni nuraghe is a monumental protohistoric complex built on an isolated and steep limestone bastion about five kilometres from Villanova Tulo, an ancient and small village of the Sarcidano area, lying on San Sebastiano hill and flanked by the River Flumendosa. It is a splendid example of a multi-layered site, dating back to between the late and recent Bronze Age (1350-1150 BC), that was never completely abandoned: the position of control over the territory meant that the area was frequented until the Middle Ages. To reach the nuraghe, you can walk an easy path of about five kilometres through an evocative landscape on the border between Barbagia di Seulo and Tacchi d'Ogliastra. The last 'slog' uphill is well worth the effort.

The architecture of the complex, built out of large blocks, consists of a central tower (keep), originally multi-storey, supported by a bastion composed of four corner towers, which enclosed two courtyards. The keep and bastion are adapted to the levels of the outcropping rock and appear to be made with different construction techniques, showing that they were built at different times. You will notice stairs, niches and battlements built into the walls. Nearby you will see a massive mural, and on the plateau above, the remains of a vast village of circular huts, dating from the recent Bronze Age and modified and expanded in the late Bronze Age. Different areas have been identified for cooking, food storage and domestic work, such as spinning.

About forty fragmentary bronze objects were recovered near the corner tower B, perhaps coming from a collapsed storeroom, including: javelin and lance points, awls, axes, laminae. The bronzes are in addition to two silver plates, one of which represents a feather. When excavating the site, beginning in the mid-19th and repeated several times at the end of the 20th century, obsidian sickle teeth, bone-crested needles, and various ceramic finds - basins, bowls, vases with high necks, olle - were found, as well as a fragment of a bronze oinochoe handle of the Schnabelkanne type, unique among the Tyrrhenian materials imported into Sardinia. This object came from Etruria, used as a precious funeral item for princely tombs and widespread in the Italian world. The fragment of the Adoni, forged with a seven-leafed palmetta surmounted by two entwined serpents, dates back to the 6th century BC. Coins found are attributable to the Punic (IV BC), Roman Imperial and Vandalic periods. A closet full of vases, discovered in the stairway adjacent to the E tower, bears witness to the various periods when the complex was occupied in late antiquity and the Byzantine age (VI-VII AD), when the nuraghe took on the role of a castrum. The Adoni nuraghe is the largest prehistoric heritage of a territory already frequented in the ancient Bronze Age, as shown by the burials in the caves of Is Janas and Frumosa.