Arenal Volcano Park is located in Arenal Reserve. There are actually two volcanoes in this national park, Arenal Volcano with a height of 1633 meters and Chato Volcano with a height of 1140 meters. The latter has been active for nearly 3500 years. A collapsed crater and a beautiful lagoon. In contrast, Arenal Volcano is a very active volcano in Costa Rica. It erupted in 1968 and 1973. Until July 2010, the eruptions of large and small volcanoes continued, and the severity was much lower, but almost every day. There was smoke and lava coming out.