(S/E) From the ticket office car park, cross the meadow to reach the road that runs near the "Tomba dei giganti di Coddu Vecchiu" site, a collective tomb from the Bronze Age.
(1) Continue along the road which climbs gently up the hillside. At the junction, turn left to reach the second site, the "Nuraghe La Prisgiona", dating from the same period.
(2) You can, of course, turn back by following the road, but below, opposite the ticket office, there is a path (Sentiero dei Giganti) that winds down through the heath back to the starting point, offering some lovely views of the countryside.
At the end of this path, rejoin the road and the car park at the start (S/E).