Crannogs are lake dwellings built on a small island, sometimes reached by a causeway. There are crannogs at Fair Head, Co. Antrim and a splendid reconstruction at Quin, near Shannon Airport in Co.CIare, There, the Craggaunowen Project has recreated a number of ancient dwellings and ring forts which vividly show the lifestyle of people in Ireland 3,000 years ago. Kilcorran Crannóg , Co. Monaghan.