Arenal Volcano, Costa Rica (8/20)

Arenal Volcano is one of Costa Rica’s most iconic and active volcanoes, offering stunning views and opportunities for adventure. While it hasn’t erupted since 2010, its symmetrical cone shape and surrounding tropical rainforests are still a draw for travelers. Visitors can hike up the slopes of Arenal, soak in natural hot springs, or go zip-lining through the forest canopy, all while taking in breathtaking views of the volcano.