"The largest and most harmonious of the Sardinian tholos, which closely resembles the breadth of those magnificent and splendid Peloponnesian acheas of the mid-2nd millennium BC". The 'father' of nuragic archaeology Giovanni Lilliu praised the singularity and elegance of the 'false dome' vault of the central tower of the nuraghe is Paras. The prehistoric fortress and the surrounding village stand on a limestone hill in a dominant position on the immediate northern outskirts of Isili. The name means 'the friars', because the land where it stands belonged to the Piarists from the 17th century, who built a monastery here. It used to be called su Idili, like the town where it is located.

The monument, built with blocks of marly limestone (white and brown) arranged in horizontal rows, consists of a central tower surrounded by three secondary towers, connected by curtain walls.