Wear shoes you don't mind ruining—the volcanic dust is relentless and the terrain is rough. You're here to hike the rim of an active volcano for that alien-landscape aesthetic. Skip the midday sun; it's a literal furnace with zero shade. Most catamaran cruises stop here for a swim in the iron-rich orange hot springs nearby. Give it two hours to summit and back, then rinse off the sulfur smell in the sea.
