The lake is home to at least one crannóg -- an artificial island used as dwellings and defense mechanisms in prehistoric Ireland. Crannóg's are the oldest dwellings in prehistoric Ireland. There are additionally at least seven ringforts surrounding the town of Lisacul. Eileen McDonagh, Cathal's mother, told the Irish Independent that he was supposed to be doing his homework when he made the discovery. She said that her son became bored with his schoolwork and went for a walk down to the lake, where he paddled up to his ankles in a pair of wellington boots. It was there that...