21/01/12. Bahir Dar, Ethiopia. Bahir Dar lies on the banks of Lake Tana, Ethiopia's largest lake. Lake Tana is 68km wide nd 73 km long and is dotted with islands, on many of which are monasteries and churches. Picture shows the murals of Ura Kidane Mehret, painted between 100 and 250 years ago, on the inside walls of the monastery, which was founded in the 14th century. Photo credit: Jane Hobson.