Arenal volcano is the smallest and most active volcano in Costa Rica. Long dormant, Arenal erupted in July of 1968 and has been constantly active since. Prior to this, the last eruption is thought to have been around 1500 AD. The volcano is approximately 3000 years old and has an elevation of 5500 feet.The area is rich in natural attractions; experience thermo-mineral hot springs, waterfall hikes, horseback riding, birdwatching, biking, and boat tours on the Cano Negro.