The big draw there is the huge cave system, then of course the clear water also helps. There is enough to do there for a day or so in the OW, "OW-safe" cavern (with light) and poking your head in (without a light) to the other caverns of the Devils run, maybe a river drift as well as doing the main cavern at night (technically a cave as there is no light zone, but its pretty similar to the daytime). The dives are pretty friendly as long as you dont go into the real cave system, lots of people do them. If you find yourself bored after a day (i would suggest one tank for the ballroom, one for the devils/river drift and one for a night dive) there are other state parks or commercial OW-safe caverns in the area you could visit within an hour or two max drive. When you turn 18 (assuming you have an AOW cert) i would recommend taking a cavern course to continue to improve your skills as well, most people find it a useful course! I have dove the ballroom at least 20 times and found something new during at least 10 of those dives, i think i have seen most of that cavern now.