The Mousa Ali Volcano is a 2,021 metres (6,631 ft) stratovolcano located on the tri-point borders of Ethiopia, Eritrea and Djibouti. The volcano is the highest point in Djibouti. The volcano's summit is truncated by a caldera, which contains rhyolitic lava domes and lava flows. The last known eruption occurred during the Holocene era.