Easy access. Park at the cafe/shop next to the beach and walk towards the dunes across the road, bearing NE ( I would guess). The Ossuary, The Little Menhir and The Broken Menhir are all close to each other. I failed to find The Great Menhir.
At one stage, the stone leaned markedly, rather than standing fully erect, and was known locally as "The Dean". This name apparently had something to do with an elderly dean of the island who had recently married a woman very much younger than himself
Jersey in Prehistory
La Haule Books