The most famous volcano of all is Arenal. Arenal has a picture-perfect cone and until recently, was one of the most active volcanoes in the world. However, activity has declined of late and Seismologists suggest that Arenal is resting. However, its popularity has put the town of La Fortuna on the map and the surrounding area has become a hotspot for adventure holidays in Costa Rica. White water rafting, hot springs, canopy walkways, wildlife hikes, horse-riding, hanging bridges and zip-lining are all available, as well as a broad choice of accommodation.