The nuraghe Corbos is a circular-plan, single-tower nuraghe eleven metres high with a niche, a staircase passageway and a central chamber surrounded by three niches arranged in a cross.
The wall facing is made up of rows of basalt ashlars, polyhedral in the lower part, square and polygonal in the upper part of the structure, with a slightly curved finish on the exposed face.
Since the entrance is impassable, entry is through a breach that leads to a spiral staircase.
The corridor, with projecting walls, is much wider near the niche and the staircase passageway and expands even more near the entrance to the chamber.
To the left of the corridor, there is a spiral staircase 20.8 metres long and around one metre wide with a trapezoidal opening. The left wall of the stairwell has three loopholes that look out onto the surrounding territory.
The passageway niche, in line with the staircase, displays a trapezoidal-shaped entrance and a projecting roof.
The central chamber, with a diameter of 4.55 metres and a height of 9.5 metres, is bordered by three niches with pointed entrances. It is entered through a trapezoidal door that has retained its tholos roof over time.
The upper floor has a circular chamber with a diameter of 3.2 metres, off-centre towards the west side, with a short passageway that, at the intersection with the staircase, once led to a large window, now demolished.