Its twin peaks gave it the Nahuatl name "hill of the two breasts," and it dominates the entire San Vicente valley. The Chichontepec is the country's second-highest volcano (2,182 m) and, although it has never erupted in historical times, its slopes are alive: there are active fumarole fields (ausoles) with thermal pools and sulfur vents. From the summit you can see both oceans. It's a demanding climb that should never be done without a guide.