Very nice dive site: lots of swim throughs that allow open water cert. divers to feel like they are adventurous cavern divers without all the dangers of cavern diving (though keep in mind, this is still, in fact, a cavern with an overhead roof). There are some fossils protruding from the walls of the cavern which were interesting. The water temp is 72 degrees, so bring a hood. The employees in the dive shop are very helpful, the picnic tables are set near the entrance to the spring making set-up of scuba gear convenient and the shower has hot water (which feels pretty good after finishing a two tank dive in Feb when air temp was in the 60's). I enjoyed this site more than the nearby Blue Grotto.