A pretty good park. It is like a huge jungle around a lake. The lockers and towels are free to use. There are a few different restaurants, all buffet style, with alcoholic and non-alcoholic drinks all included. The activities included snorkeling, cliff jumping, tubing, zip-lining, a really tall water slide shaped like a lighthouse, and some caves/cenotes to check out. The shuttle picked us up from our hotel at 7:30am, arrived at the park around 9:30am, and took us back to the hotel at 6pm.
There are a ton of other activities that can be scheduled but cost extra pretty expensive. These include walking with dolphins, swimming with dolphins, stingray encounters, swimming with manatees, zip-biking, riding a speedboat, etc. I didn't book any of these extras.
Tip: USE BUG SPRAY. I got a ton of mosquito bites from this park, so many that it looks like I have the chickenpox.