Though its name, Dermot and Grania’s Bed, was mistakenly applied to this location on old Ordnance Survey maps (the actual spot bearing this romantic title lies about 100 metres to the west), the monument itself tells a fascinating story of Neolithic construction. The tomb consists of an unroofed gallery approximately 5 metres long, lacking the court feature typical of many similar structures, and sits within a slight mound that stretches 19.5 metres in length.

The entrance to the gallery is particularly intriguing, featuring a doubled pair of jamb stones that once formed an antechamber about 1 metre long. These four stones, though several show signs of damage with their tops broken off, still mark the southeastern entrance to the tomb. The outer jambs stand 0.9 metres apart, with the northern one reaching 1.1 metres in height, whilst the inner pair narrows to just 0.55 metres apart. Beyond this antechamber, the main gallery extends 4 metres and was originally about 2 metres wide, tapering to 1.25 metres at the rear where a fine gabled backstone, standing 1.3 metres high, forms an impressive closure to the chamber.

The tomb’s current state closely matches descriptions from the mid-19th century, suggesting remarkable preservation over the past 150 years. However, earlier accounts from the 1840s mention additional ‘disfigured’ smaller graves within the mound and ruins of other graves nearby, though no trace of these remains today. The surviving structure, with its two orthostats on the northern side and a combination of two orthostats and a small stone forming the southern wall, may have originally been divided into two small chambers, though it’s equally possible it functioned as a single long chamber beyond the antechamber. Set against the dramatic backdrop of the mountains of northwest Donegal on the southern horizon, this ancient tomb continues to command its landscape much as it has for thousands of years.