Tis Isat, the Blue Nile Falls. In the vast and beautiful Lake Tana is the source of the Blue Nile, the great branch which flows back in Sudan on the White Nile, the great Nile which runs through Egypt and the Mediterranean will die. The great Nile crocodiles which was inhabited by huge, and crossed by the pharaohs and priests worshiping the sun god, Ra, and the entire pantheon beneath his wings. Discover the source of the Blue Nile (Abay River in Ethiopia) was one of the big goals of the early explorers. One of those mysteries, along with the White Nile, which brought many heads. And long been confused with cataracts that sit a few miles beyond the right place (the falls are about 30 km from Bahir Dar).