The wedge tomb at Cool, on a ridge running south-west from Feaghmann mountain on Valentia Island, is well preserved in its essential structure, but several of the slabs now leaning against its western and eastern ends are not original. Local tradition holds that they were added in the nineteenth century by an evicted family, who reshaped the ancient monument into a rudimentary shelter. That detail alone gives the site an unsettling quality that no amount of prehistoric atmosphere could quite match on its own.

Wedge tombs are the most numerous megalithic tomb type in Ireland, built broadly during the late Neolithic and early Bronze Age, their chambers typically tapering in both height and width from west to east. The example at Cool follows that pattern in height, dropping from 1.25 metres at the western end to 1.1 metres at the east, though it is notably broad for its type, measuring 2 metres wide against a length of only 3.5 metres. The chamber is formed from single slabs on each side, with a small orthostat, an upright standing stone, set inside the northern side-stone at its eastern end. A single roof-stone covers the whole, resting on the two side-stones and on a pad-stone. The structure sits within a low mound that rises to about half a metre at the western end, and it is oriented ENE-WSW, a common alignment for the type. Ruaidhrí de Valera and Seán Ó Nualláin, whose 1982 survey of megalithic tombs across counties Cork, Kerry, Limerick, and Tipperary remains a foundational reference, noted the additional slabs and raised the possibility that they were introduced precisely to make the chamber habitable as a shelter.

The site occupies a level terrace towards the end of its ridge, and from it the Portmagee Channel opens up to the south. That view, so broad and exposed, makes it easy to understand why the builders chose this spot, and perhaps also why a desperate family in the nineteenth century, stripped of their home during the land clearances that convulsed Kerry as elsewhere, might have looked to a stone structure this solid and this sheltered as something they could adapt for survival.