 East of Volcán Tacana (4,092 metres) which marks the Mexican frontier, the principal volcanoes are Tajumulco (4,220 meters); Santa Maria (3,777 meters), which was in eruption during 1902, after centuries of quiescence, in which its slopes had been overgrown by dense forests; Atitlan (3,557 meters), overlooking Lake Atitlan; Acatenango (3,976 meters); Fuego (i.e.