(1/18/2017) Bet Maryam Monastery, Lake Tana, Bahir Dar, Ethiopia. A priest poses majestically with his cross at the door of Birgida Maryam Monastery on one of the islands of Lake Tana. Lake Tana, Ethiopia's largest lake is the source of the Blue Nile from where it begins its long journey to Khartoum and on to the Mediterranean. (Photo by Sergi Reboredo) *** Please Use Credit from Credit Field ***