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 emission of sulfur and precipitation of calcium carbonate. Hot springs and geysers are common in this area due to the existence of this volcanic field. Beautiful rivers, waterfalls, lagoons and panoramic views are everywhere. Primary cloud forest and rainforest cover the park, which abounds with flora and fauna species in multiple life zones.

You can hike up to the crater following the marked trails from the park. Also you can hike trails leading to the Río Celeste, with a waterfall, fumaroles and boiling mud-pools nearby.