Cerro Chato Volcano
Arenal Volcano’s little brother, Cerro Chato Volcano, is not as high or as active as its younger sibling.
Located on the southeast side of Arenal Volcano, bordering the Arenal Observatory Lodge & Spa property, Cerro Chato (“Cerro” means mountain in Spanish) is a dormant volcano. It is believed that Cerro Chato Volcano first erupted 38,000 years ago during the Pleistocene period and last erupted about 3,500 years ago. One of its lava flows created the waterway that now leads to the La Fortuna Waterfall.
Cerro Chato’s truncated volcanic cone, covered with a thick carpet of rainforest, rises to 1,140 meters (3,740 ft). A lagoon of bluish-green water fills the 500-meter-wide (1,640-foot) crater. Access to Cerro Chato is prohibited by order of the Ministry of Environment and Energy (MINAE)