Ireland - Lough (Loch) Derg - Station Island - St. Patrick's Purgatory

Catholic pilgrims pray on Station Island at Lough (Loch) Derg, one of the oldest religious pilgrimage sites in the Christian religion. Saint Patrick prayed here. The religious site is open to pilgrims of all religions from May to mid August. They come for up to three days of religious devotion, the first twenty-four hours without sleep and only black coffee and toast to eat. (Photo by ANDREW HOLBROOKE/Corbis via Getty Images)