The site is known for a large flat rock covered in Bronze Age cup-and-ring carvings, one of the most significant concentrations of such prehistoric rock art in Ireland, and at some point after Christianity arrived in the west of Ireland, someone added a cross to it. That act of inscription, modest in scale, was far from unusual as a practice. Early Christian communities across Ireland frequently marked older sacred stones with crosses, absorbing pre-existing places of significance into a new religious framework rather than abandoning them.

Boheh, sometimes called St Patrick's Chair, sits on the southern slopes of Croagh Patrick, the mountain that has drawn pilgrims for well over a millennium. The rock art beneath and beside the cross is thought to date to the Bronze Age, making the carved surface several thousand years old before any Christian hand touched it. The cross inscription belongs to a broad tradition of early medieval religious marking, though the precise date of this particular addition is not recorded. What gives the site an additional layer of strangeness is an astronomical phenomenon observed here: on two evenings each year, around 18 April and 24 August, the sun appears to roll down the northern shoulder of Croagh Patrick when viewed from the Boheh stone, an effect sometimes called the Rolling Sun. Whether this alignment was intentional in prehistory is debated, but it draws those with an interest in archaeoastronomy as reliably as it draws those on the traditional pilgrimage route.