Venture to Barracuda Lake, known as one of the world’s most unique dive and snorkel sites. Tucked inside a volcanic crater, this lake is famous for its dramatic thermocline—a layer where the water temperature shifts significantly from cool freshwater near the surface to intensely warm saltwater deeper down. Descend through the deep, clear waters to experience this surreal temperature change and admire the jagged, underwater rock formations often used by professional free divers.