The Sculpture Park is amazing but don't use Aquaworld for your scuba or snorkeling. They are more expensive than other dive shops AND they only gave us about 15 minutes at the Park site before guiding us to a near by reef, although they advertise the trip as a 2 dive, one reef and one at the Park. We almost didn't even get to scuba at the Park as they assumed being more advanced divers we'd prefer reef diving and took us to a completely different site. Several of us, who are artists, expressed out displeasure, and that we only wanted to dive at the Park so we motored to the Park but were still only given 15 minutes to enjoy it. I'd suggest you google dive shops in Cancun, check their sites to see if they offer the Park dive, and use them. You'll probably have a smaller boat to dive from, but you'll have more time at the Sculpture Park.
Mike
Mike