An Irish documentary narrated by Brendan Gleeson telling the story of the Burren region in County Clare is set to air on US television this month. BURREN: HEART OF STONE presents new evidence of human activity in Ireland 20,000 years earlier than previously thought. The two-part documentary, which attracted more than one million viewers when it aired in Ireland, will treat audiences to a visually impressive and thought-provoking story about the resilience and beauty of the famous Irish landscape.