AreÂnal is the most active and youngest volÂcano in CosÂta Rica and one of the most active volÂcaÂnoes in the world. At the foot of the volÂcano lies the town of La ForÂtuÂna and the counÂtry’s largest inland lake, Lake AreÂnal, a water reserÂvoir. The AreÂnal waterÂfall is also famous.







