Connected to the mainland by a narrow causeway of boulders stretching some 30 metres eastward, this adapted natural island offers a fascinating glimpse into how Ireland’s ancestors modified their landscape for defensive habitation. The setting is particularly atmospheric; the lake itself lies within a strip of coastal machair, with mountainous terrain rising to the south and the beach-fringed Maghery Bay about 750 metres to the west. Less than a kilometre northwest, the historic Templecrone church and holy well mark an old pilgrimage route, adding layers of sacred significance to this already remarkable landscape.

The island presents a roughly circular raised platform, measuring about 18 to 20 metres east to west and 23 metres north to south, with its grass-covered surface providing a relatively level area that would have been ideal for settlement. The defensive adaptations are clearly visible in the rubble wall that reinforces the eastern and southern edges of the island; this jumbled construction of large stones and boulders, measuring 2.5 to 3 metres wide, barely rises above the interior ground level before slumping down to the water. Perhaps most intriguingly, beneath the waterline lies what appears to be a deliberately constructed flat-topped stony ledge, roughly a metre wide and sitting about 20 centimetres below the surface, which may have served as an additional defensive feature or landing platform.

The interior space tells its own story of occupation and modification through the centuries. Bedrock outcrops in the northern third of the island, rising to a small peak topped with a flat grassy area about five metres across, whilst the remainder slopes gently towards the south and southeast. A low heap of stones in the southern half hints at collapsed structures, and more recent activity is evident in a rectangular drystone enclosure on the eastern edge, measuring four metres north to south and just over two metres east to west. This later addition, which faces the causeway, post-dates the original perimeter wall and may have served as a shelter or storage area. A single upright stone, standing 80 centimetres tall just west of this enclosure, adds another enigmatic element to this multi-period site.