What survives here is a leacht, a type of commemorative or votive cairn associated with early Christian devotional practice in Ireland, typically built as a focus for prayer or as a monument to a holy person. This one has collapsed so thoroughly that its exact boundaries are difficult to establish, but measurements suggest it was originally roughly rectangular, running about three metres north to south and two and a half metres east to west.

The structure sits on Oileán Máisean, around twenty metres north-north-west of an early Christian church, and it appears to belong to the same religious complex. A second leacht survives about fifteen metres to the south-east, that one still visible within a curving enclosure surrounding the church itself, and the two were probably similar in form when intact. The collapsed mound is built primarily from granite boulders, though a single limestone slab was also recorded among the rubble, an unusual material in this granite-dominated context. More striking still is a pillar stone standing in the northern half of the structure, leaning sharply to the east, as though it has been slowly giving way for centuries. Such pillar stones are a recurring feature of early Irish ecclesiastical sites, sometimes serving as grave markers, sometimes as devotional focal points, and often defying a tidy single interpretation.