By this point in our trip, we were fairly well "nuraghe'd out" and had ignored many over the previous few days. They are everywhere! But this is a curious construction.
It's built into a rocky outcrop, and there's a side entrance to a cave underneath.
The main entrance leads to stairs winding round to the right, and reaching the first floor level above the doorway. A second flight goes up to the top, and a passage way ahead leads to a room with two niches in the wall, and then a very impressive second flight of stairs back down again - leading currently nowhere, but possibly a way into the now inaccessible main chamber of the nuraghe.
Climbing to the top gives a great view of the rest of the settlement, and the cows grazing in the field.