This small, roughly circular space, measuring about five by six metres, is defined by low stone banks covered in sod. The walls incorporate a mix of medium stones and hefty boulders, and appear to have been built after the religious site they adjoin, suggesting this peculiar addition came later in the site’s long history.

The enclosure’s most striking feature is an entrance known locally as ‘St. Columcille’s arch’ or simply ‘The arch’. Two upright stone slabs, each about a metre tall, stand parallel to one another with their long sides facing each other, supporting a horizontal lintel stone topped with a loose pile of smaller rocks. Inside the enclosure lies a large flat stone slab, prostrate on the ground. Together, these elements formed an important stop for pilgrims visiting the nearby holy well, located just 35 metres to the northwest.

According to local tradition, those suffering from backache would incorporate this enclosure into their pattern; the ritual rounds performed at holy sites. The cure involved squeezing through the narrow arch three times whilst reciting prayers, then lying upon the flat stone inside. While some have speculated that the upright stones might be remnants of a prehistoric megalithic tomb, this theory has been dismissed by archaeologists. Instead, this humble stone enclosure stands as a testament to centuries of folk healing practices, where the physical act of moving through sacred space was believed to bring relief from earthly ailments.