Volcán Chingo is a symmetrical stratovolcano that straddles the Guatemala/El Salvador border. A shallow, oval-shaped summit crater is breached on the W side. Other small stratovolcanoes and cinder cones are located on both sides of the volcano along a major N-S-trending fault. Youthful cones, such as Cerro de Olla, lie across the Salvadorian border to the S. To the N in Guatemala, Volcán las Viboras, a cinder cone that caps a basaltic shield volcano, is the most prominent of several fault-controlled cones near Laguna Atescatempo. Flank fissures have fed many youthful lava flows, particularly on the W flank of Chingo and the N flank of Volcán las Viboras.