On the SS292 south of Villanova Monteleone, with great views towards Lago de Temo.
It was 2pm on a gloriously hot day; the site is fenced off and a recently adapted notice said that it would open at 14:30, so we sat in the car park and had a picnic, and read. And waited. No sign of anyone, we waited another 10 mins and then decided to wait no longer. Beardy took the direct route of over the tall padlocked gates, and I went for the walk along the drystone wall between the barbed wire approach. For future reference, the easiest method if needed is the exit I used - under the tree at the corner of the road and carpark!
The entrance fee is 1½ euros, and we left sufficient coins on a stone by the ticket hut, in case someone appeared ...
There are 9 tombs here, set into two outcrops of rock, of which the most interesting is no 8, with its main chamber (through an anti chamber) having a ceiling carved to represent a roof and rafters, and a false door to the afterlife. The tombs mainly have double framed entrances and cups in the floor of the anti-chambers for offerings, and grooves which I assumed where for drainage.
Admittedly, we'd missed some carvings (other than the architectural features) here, but for a signposted, pay to enter site, I was a little disappointed, compared to what we'd seen already (and without knowing where our next stop would be, the fabulous Santu Pedru).