Paradise - no cavern cert needed, just OW. Its what is designated an OW safe cavern - has a thick line that runs to the exit, doesnt lead into a cave system. There are two sections to it, one is shallow to about 25ft that can be used to train or check things before moving into the cavern zone, on the other side of the cone is the cavern proper. It goes down to about 100ft to the reaper sign (where you stop) with two silty passages beyond which are not recommended for OW divers. You can still see the exit (on a day or good viz) from the sign and that is where the rope ends. Its a little tight down at that depth, but much larger above 60ft or so where most people spend most of their time! Wear two lights (one of those as a backup) and go in mentally prepared for the fact that you cant directly ascend - its almost 150-200ft back at the reaper sign, so not a quick exit. Its $30 cash only (maybe they take checks, cant recall, but no card transactions) for the day. It can be busy and with no other major springs open this last weekend and maybe this coming one, i wouldnt be surprised to find a lot of classes and other divers looking to use it - might get silty. Stay off the floor there is no flow in that sink and once the silt is stirred up it takes forever to drop out of the water again - this summer when i have been there the viz has been badly blown, in the winter it wasnt so bad, i could clearly see the exit from the sign (rather than a hazy glow through the sediment)! Its a nice spring to dive and gives you a good idea of cavern diving (i would also recommend a few other places to get an idea, some are light permitting, some are prohibited).
