Los volcanes de Colombia (18 Volcánes)San Diego | Romeral | Cerro Bravo | Nevado del Ruiz | Santa Isabel | Nevado del Tolima | Machin | Nevado del Huila | Puracé | Sotará | Petacas | Doña Juana | Galeras | Azufral | Cumbal | Cerro Negro de Mayasquer
Colombia has 15 volcanoes considered active. The volcanoes are related to the subduction zone that runs along the whole of America's western plate margin. Colombia's volcanoes are part of the northern Andes and lie at the junction of 3 tectonic plates, the Nazca, Caribbean and South American plates.
Map of Colombia's major volcanoes (USGS)