Costa Rica’s most active volcano — Arenal — still erupts. The most dramatic views of the red lava, snaking down the slopes of this conical volcano, come at night. Pull off to the side of the road (in a safe place) to watch the memorable spectacle. During the day, the park’s look-out trail leads to an overlook from which the lava flow may be visible. A sighting, of course, depends upon the volcano and also upon the weather. Frequently, clouds obscure Arenal’s slopes or cones.

Athletic teens and ‘tweens enjoy navigating the dirt roads at the volcano’s base on mountain bikes. Check ahead for companies that offer these guided outings.

Tip: Since Arenal is about three and a half hours from San Jose, plan to stay overnight.