9. Mousa Ali
Mousa Ali is a volcano which touches Djibouti, Eritrea and Ethiopia. It is the tallest mountain peak in all of Djibouti with an elevation of 2,028 meters or 6,654 feet. The volcano has a prominence of 1,607 meters or 5,272 feet which makes it an Ultra prominent peak. Actually, Mousa Ali has two summits and one of the summits is in Ethiopia with an elevation of 1,871 meters. It is a dormant volcano and its last eruption was during the Holocene period (11,700 years ago).