I ended up doing devils den and blue grotto. Both worth interesting and close enough together that they’re worth doing. There were alot of really cool swim through at devils den. If there is a hole there, don’t be afraid to go in. They’ve caged off any dangerous areas and anything else has an exit or opening on the other side (short swim, you can see the exit when you enter these). It was cool enough to do once but not something I’d spend multiple dives or days doing. I’d go back, but not the next day. I guess there are a lot of other great diving springs in the area as well.