This passage tomb is a chambered cairn, made completely of rock. Its central passage aligns with the moon at its southern minor standstill, which occurs every 18.6 years. This indicates close attention paid to the moon’s rising and setting points along the horizon over its 18.6 year cycle. The entrance is oriented 228 degrees southwest, similar to other chambered cairns of the Clava group. A ring of kerbstones rivets the cairn, and a ring of standing stones surrounds the site. The roofing of the vault follows the corbeling pattern. A large cupmarked slab, possibly the slab that completed the chamber now lies near the center’s top right.