34.2 and 35.2: The nuraghe “Alvu” of Pozzomaggiore never fails to surprise visitors with some of its peculiarities. Despite its name, which is also known in other towers like Alvu of Nulvi, this quadrilobate nuraghe is characterized by a two-colored main tower and features numerous bases of huts in its surroundings. Starting from the bottom and up to the eighth course, the stone used is dark basalt, more or less roughly shaped. From the ninth course, it switches to white limestone, with more carefully cut and smaller blocks as one ascends in height. An interesting feature is represented by the particular interlocking of the corner walls, which cannot be found in other monuments of this kind. In the territory of Pozzomaggiore, there are over 40 nuraghi, including three nuragic villages and some pseudo nuraghi. The “Ruggiu,” in particular, is a single-tower nuraghe located near the inhabited center and equipped with an intact tholos. The photos of the nuraghe Alvu are by Giovanni Sotgiu, Sergio Melis, and Bibi Pinna. Those of the nuraghe Ruggiu are by Giovanni Sotgiu.