What was for the Nuraghi is not yet given to know for sure. Built around a spring located at about 1000 meters above sea level, for the vastness of the area and the number of monuments created by this civilization, it was certainly a very important place, where the Nuraghi lived stably, for a long period of history. It is hidden in the mountains, but immediately in position of watch on a vast territory, overlooking the valleys of "Riu Pardu" and "Taquisara".
Certainly, what was the equivalent of a town for the time, is still a green and lush Eden, with plenty of water and an enviable microclimate. Scattered among the vegetation, the walls are one after the other. These are simple and polylobed nuraghes, large tombs of the giants accompanied by smaller ones, circular (mostly) and rectangular (rarely) huts.
The great "pinnettos" today present and accessible, the picnic areas installed by the Forestas Agency, along with the well-marked trail network (which connects it to Grotta Taquisara and then to the Nuraghe Serbissi, or to Perda Liana and then to Montarbu), makes Is Tostoinos a place of stop not to be missed on the way between the Tacchi d'Ogliastra.