The Tenorio Volcano, with multiple craters at a maximum height of 6,286’, is the reason why the river was named Rio Celeste (Light Blue River) resulting from the emanation of sulfur and precipitation of calcium carbonate. Because of the volcanic field around this area, hot springs and small geysers are common. Beautiful rivers, waterfalls, lagoons and panoramic views are everywhere. Primary cloud forest and rainforest covers the park, which abounds with flora and fauna species in multiple life zones.