Located in Florencia, San Carlos
10 kilometers northest from Ciudad Quesada.
In San Carlos you can find one of the biggest attraction of the country, the Arenal volcano was Costa Rica's most active volcano until 2010, and one of the ten most active volcanoes in the world. It has been studied by seismologists for many years.
The volcano is located at the center of Arenal Volcano National Park in the northern zone of the country, 15 kilometres (9.3 mi) southwest of the La Fortuna district in San Carlos (canton), Costa Rica. The temperature varies from 9 °C (48 °F) in the high areas to 89 °C (192 °F) in the low areas and the annual rainfall is around 349 centimetres (137 in).
Arenal Volcano area is an important watershed for the Arenal Lake Reservoir. The reservoir's water is used for hydroelectric power. It is also connected to the national system.