Arenal Volcano is the perfect cone shape children draw when they imagine a volcano - tall, pointy, with a wisp of steam at the top. It is around 1,670 metres tall. For years it puffed out small lava flows nearly every day, but since 2010 it has been quieter and is now mostly resting.
Po谩s Volcano has one of the largest active craters in the world. The crater is more than a kilometre across, and at the bottom there is a turquoise-coloured lake that bubbles and steams. Visitors can drive almost to the edge to peek inside.
Volcanoes can be scary, but they are also helpers. Volcanic ash breaks down into very rich soil. Costa Rica's farmers grow some of the world's best coffee in the dark, fertile dirt around the volcanoes. The plants love it.
Costa Ricans have learned to live alongside their volcanoes. Scientists watch them carefully every day, and there are warning systems to keep nearby towns safe. Children growing up in places like La Fortuna, the little town next to Arenal, can see their volcano from their classroom window.