Rent a kayak or a stand-up paddleboard to navigate these flooded limestone tunnels. The real hook is the natural light filtration that turns the water a surreal electric blue near the entrance. Spend about two hours exploring the deeper chambers, but skip the crowded group boat tours if you want any decent photos. Go during a weekday morning to avoid the tourist splash-zone. Wear a dry bag for your phone; these caves get drippy.
