Two unusual volcanoes on Io: Inachus Tholus (lower) and Apis Tholus (upper). Kava Patera (with a dark zone on the edge) is seen in the right. Piece of image mosaic, made of photos by Voyager 1 and Galileo (the color is taken from Galileo images). Image size is 400×400 km, north is up, contrast is increased. (See also one of Voyager-1 original frames, a chapter about these volcanoes in Davies, 2007 and a page in Io Mountain Database).