The tree, growing directly in the entrance of a small ruined structure, is one of those small details that crystallises just how thoroughly a building can be reclaimed. The structure itself is easy to miss: dry-stone walling, a technique that uses no mortar, relying instead on the careful fitting of large boulders with smaller stones pressed into the gaps, survives here to only three courses at most, rising about a metre above the interior floor level. The rectangular interior measures roughly 2.6 metres by 1.7 metres, barely larger than a garden shed, and the rear north-eastern wall has sunk so far that it is now flush with the hillside behind it.

The building sits on the western flanks of the Blackstairs Mountains, south of Mount Leinster, in an area now planted with coniferous forestry. What gives the ruin its particular interest is its wider context on the hillside. Clustered nearby are the remains of several charcoal-making platforms, the levelled or slightly hollowed earthen surfaces where wood was stacked, covered, and slowly burned to produce charcoal for smelting or smithing. The presence of so many such platforms in the immediate area raises the possibility that this small building served those operations in some capacity, perhaps as a shelter for workers, or as storage. It is a tentative connection, but a plausible one given the concentration of industrial activity across the same slope. The views westward over the Aughnabrisky River valley, visible from this exposed hillside, suggest the location was chosen with some practical intention beyond mere shelter from the granite terrain.