Re: Bon Aire v Belize
The Blue Hole is an unforgettable dive because you've never seen anything like it. You drop through a hole in the sandy bottom, shallow, sea floor into a huge underwater cavern complete with stalactites. People who have explored the arms of the cave speculate that it may connect to the cenotes (freshwater filled caves) on the mainland 60 miles away. You can see the deeper blue color in the image where the hole is.
If you are breathing air, as I was, you can only stay 8 minutes at 130 foot depth but you will definitely remember those minutes. On ascent, you stop at the sandy bottom at 25 feet to outgas. They entertain you by chumming the water so you can watch the hammerhead and reef sharks in a frenzy, attracted there specially for the tourists. Here's what they look like from above.
Elsewhere on the reef is the Half Moon Caye National Monument where you can check out the red-footed boobies.
The Blue Hole is pretty much barren of life except for a stray grouper curious about the tourists. But the diving on the coral reef surrounding the atoll is spectacular. I remember unblemished coral, large tropical and pelagic fish, swimming through mountainous chutes of coral and dropping down sheer coral-filled walls.
I think there is a small dive resort on one of the atoll islands where you can stay or you can do a live-aboard for more intensive dive explorations. I took a long day trip leaving early on a fast boat. If you are mainly interested in diving, the other options are probably better.