Cairn III

Other concentric faces (between three and five) surrounded the monument, bringing the total volume to some 15,000m3 (10,000m3 of which now remain).

The plan is still subpentagonal with rounded corners, but it now stretches 50m from east to west and 53m from north to south. The materials mostly used are water-worn rubble of local metamorphic rocks, collected on the foreshore or on the surface.

The irregular rounded shape of the stones means the faces had to be built at an angle for stability.

The building of cairn III blocked off the access to the cairn II dolmen, but this extension allowed the building of two other crypts which opened onto the eastern facade. Crypt IIIa corresponds to the excavated dolmen formerly restored, and crypt IIIb was entirely destroyed when the bunker was built.

The entrance of dolmen IIIa with its monumental portal.