First, you'll head towards the base of the volcano to hike Arenal 1968. This is a network of trails named after Arenal's last major eruption. The event was so catastrophic it transformed some of the region’s topography, and lava fields now dominate one side of the volcano. The trails wind through those lava fields as well as the surrounding rainforest. Along the way, you'll find lookout points featuring prime views of Arenal.
Later in the afternoon, you'll experience the other star of the Arenal Volcano region: La Fortuna Waterfall. If Arenal is the most famous volcano in the country, then La Fortuna is easily the most famous falls. It's located a 15-minute drive from the town of La Fortuna, at the base of the dormant Chato Volcano. The waters here plunge 210 feet into a tropical lagoon, and a 500-step downhill hike provides the opportunity to see the falls from the bottom up. Besides taking photos, be sure to swim and relax in the La Fortuna River below the falls.