An extensive volcanic field of fresh basaltic cinder cones and barren lava flows near Lake Güija is named after its largest feature, 781-m-high Volcán de San Diego (upper right). A large basaltic lava flow from the San Diego cinder cone dammed the drainage and was responsible for the formation of 12-km-long Lake Güija, which lies mostly in El Salvador, but extends across the border into Guatemala. Cerro el Tule cinder cone in the center of the photo lies near the eastern shore of the lake, due south of Volcán San Diego. Photo by Giuseppina Kysar, 1999 (Smithsonian Institution).