Experience a new adventure in an underwater tunnel with a trip to explore the wonders of the longest underwater tunnel in the world. Enjoy activities like snorkeling (Snorkeling Explorer) and scuba diving (Scuba Explorer), all without having to travel far to the sea. You can immerse yourself in the thrilling activities of diving into an underwater world, where you'll encounter schools of fish, numbering in the thousands, up close and personal in this freshwater and saltwater tunnel.