Always wondered what was around the corner? This is the way to find out. Cavern intrduces you to the excitement of overhead environment diving. While many find this exciting in itself, Cavern is also the first step to becomming a certified Cave Diver. Cavern is also one of the best courses to learn effective safety proceedures. Even if you never plan to dive a qcave or cavern again, this is a great way to learn all the ins and outs of planning with the ultimate in safety in mind.