Sa Jara manna, the Giara di Gesturi, is a special place under various aspects, first and foremost environmental and naturalistic, but also archaeological. The huge plateau, an unassailable natural fortress for thousands of years, today preserves traces of a very remote past: legacies from various eras reside on its slopes and on the summit. One of the most distinctive monuments dates back to the onset of the Nuragic civilisation, during the Middle Bronze Age (16th-14th century BC): it is the ‘father of all nuraghi’, the protonuraghe Madugui (local name) or Maduli (archaeological name), and it stands on the particularly protruding southeastern edge of the plateau. Today its walls are four and a half metres high, but were once higher. It is one of the most significant examples of Protonuragic (or Pseudonuragic) architecture, a prototype of the ‘corridor-type nuraghi’, which later evolved into towers or clusters of closed towers with a false dome (tholos).