EthiopiaEthiopia, officially known as the Federal Democratic Republic of Ethiopia , is a sovereign state located in the Horn of Africa.Addis Ababa or Addis Abeba(the spelling used by the official Ethiopian Mapping Authority), "new flower"; , is the capital city of Ethiopia.Adama, also known as Nazret or Nazreth, is a city in central Ethiopia and the previous capital of the Oromia Region.Lake Abbe,also known as Lake Abhe Bad, is a salt lake, lying on the Ethiopia-Djibouti border. It is one of a chain of six connected lakes, which also includes (from north to south) lakes Gargori, Laitali, Gummare, Bario and Afambo.Ras Dashenis the highest mountain in Ethiopia and tenth highest mountain of Africa.The Nileis a major north-flowing river in northeastern Africa, generally regarded as the longest river in the world. The Nile has two major tributaries, the White Nile and Blue Nile. The White Nile is considered to be the headwaters and primary stream of the Nile itself. The Blue Nile, however, is the source of most of the water and silt.