Chato Volcano, sometimes called "Cerro Chato" (Spanish for "Flat Hill"), is an inactive volcano in north-western Costa Rica north-west of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna.
It is southeast of the nearby Arenal Volcano.

It is believed Cerro Chato first erupted 38,000 years ago during the Pleistocene period and last erupted about 3,500 years ago.
One of the lava flows is now the route for La Fortuna Waterfall.
The hill has two peaks, named Chatito (little Chato) and Espina (Thorn).
A crater about 500 metres (1,600 ft) wide is filled with green water, making the Laguna Cerro Chato.
Chato Volcano, sometimes called "Cerro Chato" (Spanish for "Flat Hill"), is an inactive volcano in north-western Costa Rica north-west of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna. It is southeast of the nearby Arenal Volcano.
It is believed Cerro Chato first erupted 38,000 years ago during the Pleistocene period and last erupted about 3,500 years ago. One of the lava flows is now the route for La Fortuna Waterfall. The hill has two peaks, named Chatito (little Chato) and Espina (Thorn). A crater about 500 metres (1,600 ft) wide is filled with green water, making the Laguna Cerro Chato.
Chato Volcano