This national monument is the incredible Creevykeel Court Tomb in co. Sligo. It is regarded as one of the finest examples of a full-court tomb in Ireland and is also the largest in a chain of five megalithic buildings along this ancient routeway. It dates from the Neolithic period (c. 4000 – 2500 BC) and consists of a wedge-shaped cairn and an oval-shaped court. The court area measures 15m X 9m and is among the largest in the country. This leads to the burial gallery which is divided by upright stones into two chambers followed by another three which were originally covered by a corbelled roof. Excavations in 1935 uncovered four cremation burials, Neolithic pottery, polished stone axes, flint knives and scrapers and two clay balls. The court was reused in Early Christian times by iron smelters, and the remains of a kiln from this time can be seen.