31 b1 and 31 b2: Both nuraghi, located at a short distance from each other, are characterized by being immersed in an environment of wild beauty. They are part of a series of similar monuments, partly visually connected and positioned to guard the probable coastal landings of the Teulada coast.
The nuraghe Sa Perdaia, at the border of the territories of Domus de Maria and Teulada, was originally studied by Lamarmora in 1830. It is a probable corridor nuraghe, rectangular in shape, with an entrance to the southeast and a spiral staircase on the left leading to the second level, which is now in ruins. Studied by Lamarmora in 1830.
The nuraghe Is Orbais, in the territory of Teulada, is particularly characterized by the presence of a lintel that appears almost suspended in mid-air.
The photos of the nuraghi Sa Perdaia, in Domus de Maria, are by Bibi Pinna and Francesca Cossu. Those of the nuraghe Is Orbais, in Teulada, are by Maurizio Cossu, Lorenzo Muntoni, and Francesca Cossu.