The site lies on rough pasture dotted with rock outcrops and boulders, with the bare rocky face of Trusklieve Hill looming just 100m to the north. What makes this monument particularly intriguing is its unusual design: two separate megalithic chambers set within a single long mound, a configuration that’s relatively rare in Irish archaeology.

The 36m long mound, now heavily overgrown with bracken and briars, contains two chambers positioned 10m apart along its east-west axis. The western chamber is a well-preserved portal tomb that stands about 11m from the mound’s western end. Its construction showcases the sophisticated building techniques of its creators, with two tall portal stones flanking a doorstone at the entrance, opposed sidestones along the chamber walls, and a backstone at the rear. The chamber retains its original roofstone, which rests on corbels; flat stones that project inward from the walls to support the roof. The northern portal stone reaches 2m in height, whilst its southern counterpart stands at 1.85m, both originally designed to support a second, larger roofstone that would have covered the front portion of the chamber.

The eastern chamber tells a different story, one of collapse and uncertainty. Only fragments of its original structure remain standing: a distinctive gable-shaped stone that likely served as the backstone, two opposed sidestones, and what appears to be a displaced roofstone resting precariously atop. Archaeological analysis by Seán Ó Nualláin suggests this too may have been a portal tomb, with a long fallen slab possibly representing one of the original portal stones. If correct, this would make the Tuaim monument an example of the rare practice of placing two portal tombs within a single cairn, offering valuable insights into the burial practices and architectural ambitions of Ireland’s Neolithic communities.