Arenal Volcano.

Arenal Volcano’s near-perfect, cone-shaped silhouette dominates the skyline of La Fortuna, serving as the dramatic anchor for Costa Rica’s premier adventure hub. While the volcano has been in a resting phase since 2010—meaning you won't see active red lava flows—its geothermal footprint is felt everywhere, most notably in the natural hot springs that dot the region. Arenal Volcano National Park protects the surrounding regrown rainforest, where hiking trails wind across rugged, historic lava fields from the infamous 1968 eruption. It is a highly accessible playground where you can transition from spotting sloths and howler monkeys in the canopy to kayaking on Lake Arenal, all with the towering, emerald-draped colossus as your backdrop.