This site has a steep slope with several piles of obsidian. Within the volcanic area of Monte Arci the territory of Pau is the only one that has yielded substantial archaeological finds providing evidence of prehistoric stone knapping in the same area where obsidian was quarried. A large area at Sennixeddu has revealed substantial piles of obsidian and chips from obsidian working, on an area of more than 20 ha. Traces of a possible human settlement have been found about 350 m from the Sennixeddu obsidian working area.

From SS 131, at the turnoff for Uras follow the signs to Laconi along SS 442, passing through Morgongiori and Ales. Leaving Ales behind still, driving towards Laconi, take the turnoff to Pau, on SP 48. At the entry to the village, follow the signs for the obsidian trail.

Phone: +39 0783 934009 (museum), +39 0783 939002
Manager: Geoparco Società Cooperativa a r.l., Cagliari