A low mound of earth and stone, roughly seven metres across and barely more than half a metre high, sits in what was once, according to the 1837 Ordnance Survey six-inch map, a church and graveyard. Earlier cartographers were less clinical about it: the OS Fair Plan annotated the same spot simply as "A place called The Tomb", which at least acknowledges that people once knew something significant had stood there, even if they could no longer say exactly what.

The site is thought to possibly be the location of Ceall Tóma or Ceall Tuama, an Early Christian church founded by a figure named Ninnidh Láimhiodhan of the Ceinéal Laoghaire, whose feast day fell on the 13th of November. Early Christian churches in Ireland were often modest timber or stone structures set within an enclosing boundary, and traces of a curving bank extending south-east from the mound may be the last ghost of such an enclosure. No surface remains of a church or graveyard are visible today. Cultivation ridges running across the site in a north-east to south-west alignment tell their own story about what centuries of agricultural use can do to already fragile ground. About 230 metres to the east, a well marked on maps as "Toberawaugh" may have begun its life as a holy well, those springs or water sources associated in Irish tradition with a local saint or sacred site, though its original character is uncertain. Lough Derravaragh, the long glacial lake famous in mythology as the site where the Children of Lir were transformed into swans, lies less than 800 metres to the west.