Melimoyu is a remote volcano in Chile northwest of the town Puyuhuapi and northeast from the Moraleda Channel inlet. The volcano is about high and long, with an elongated shape. There are four summits, all principally created by phreatomagmatic activity and which conspicuously rise above the surrounding area and give the mountain its name. It is one of the larger volcanoes in the region. It bears an ice-filled summit caldera -- wide as well as another, wide caldera that is drained northeastward through a gap in the caldera rim. The volcano is mostly formed by lava flows and has a volume of about , which is comparatively large.