The Skellig Islands (Irish: Na Scealaga) are two small, steep and rocky islands lying about 16 km west of Bolus Head on the Iveragh Peninsula in County Kerry, Ireland. They are famous for an early Christian monastery that is a UNESCO World Heritage Site. The smaller island is Little Skellig (Sceilig Bheag in Irish). It is closed to the public, and holds Ireland's largest and the world's second-largest Northern Gannet colony, with almost 30,000 pairs. It is about 1.5 km east of Great Skellig. Also known as Skellig Michael (Sceilig Mhichíl in Irish), this is the larger of the two islands, rising to over 230 m above sea level. With a sixth-century Christian monastery perched on a ledge close to the top.