Towering 430m over an area of 15 km2, with an eroded crater of around 160 m diameter. It is located in the same line as Poás Volcano, Barva Volcano and Irazú Volcano. The crater border is truncated in the east side by a fault, inside of which there is a small cone of around 20 to 40 meters high, to the south there is another possible cone. Lake Congo is located on its slopes to the west as well as Lake Pozo Verde.