The Costa Rica Arenal Volcano is the most active in the country. Visit the area to see one of Mother Natureâ€™s most dazzling light shows! With regular eruptions, youâ€™re almost certain to get a glimpse of the glowing lava and luminous rocks. Donâ€™t worry, itâ€™s completely safe! Whether you visit during the afternoon or take in this sight with the stars overhead, the Costa Rica Arenal Volcano is sure to impress.