I dove both big Corona del Mar and little Corona del Mar. Near the jetty is great for new divers and it's easy to get to. Little Corona del Mar has a long hill to walk down and sucks carrying all your gear but it's free to park and great when you get down there. There usually not too many people, and they have tide pools there (now off limits to walk on) and diving is great. Lots of sea life, and easy to get in for beginner scuba divers. It ranges from 20 feet to 60 feet and you will not be disappointed.