It is easy to walk past without registering what it represents, but this unassuming earthwork is a fulacht fia, one of the most common yet least understood monument types in the Irish landscape. Fulachtaí fia are prehistoric cooking sites, typically Bronze Age in date, where water was heated by dropping fire-cracked stones into a trough. The burnt and shattered stones, piled up over repeated use, form the characteristic mound that survives today.

The monument at Termon follows the classic form well. The horseshoe-shaped bank measures roughly ten metres along its longer axis and nearly ten metres across, with the open end facing north-west. Its internal height reaches about three-quarters of a metre at the north-north-east, with the exterior face somewhat lower on the other sides. A level central area of around seven and a half metres by four metres sits within the curve of the bank, which is where the working trough would once have been. Several stones are embedded in the bank at the north-east, and a small upright slab, only about a quarter of a metre high, survives on the inner south-western slope, possibly the remnant of an original stone facing that lined or retained part of the structure. Two trees, a hazel and a whitethorn, now grow along the inner northern edge of the interior, their roots settled into a place that was once a site of considerable, repeated activity.

The setting reinforces what archaeologists have long observed about these sites: fulachtaí fia almost always occupy low-lying, wet ground, close to a ready water source. Here, the damp rough grazing and the proximity of low cliffs to the west would have made the location practical for exactly that purpose. The whitethorn growing inside the bank carries its own quiet resonance in the Irish landscape, a tree long associated in folklore with boundaries and liminal places, though whether that association shaped anything at Termon is, of course, impossible to say.