Knocknarea is a large prominent hill west of Sligo town in County Sligo, Ireland, with a height of 327 metres (1,073 ft). Knocknarea is visually striking as it has steep limestone cliffs and stands on the Cúil Irra peninsula overlooking the Atlantic coast. At the summit is one of Ireland's largest cairns, known as Queen Maeve's Cairn, which is believed to contain a Neolithic passage tomb. In recent years there has been concern that the ancient cairn, a protected National Monument, is being damaged by climbers. There are also remains of several smaller tombs on the summit. Knocknarea overlooks the Carrowmore tombs and is thought to have been part of an ancient ritual landscape.