fortresses

While carrying out routine field work in the Burren lowlands of County Galway in Ireland, field archaeologist Michael Gibbons discovered a Bronze Age fortress that may be almost 3,200 years old. The expansive ancient rock fortress is approximately 1,300 feet (400 meters) long on its north and south sides, and measures about 328 feet (100 meters) along its eastern and western walls. The latest Irish Bronze Age fortress is bounded on all sides by turloughs, a type of seasonal lake found only in Ireland west of the River Shannon. The turloughs were completely dry part of the time and filled with water at other times. When filled with water they could form a barrier that was virtually impenetrable. It is