Get a waterproof camera as there are plenty of different fish surrounding you. Also saw a stingray and plenty of Iguanas. You can do the nature walk on your own. Grab a hammock and stay awhile.
I was pleasantly surprised as I very rarely get off in Nassau, but I wanted to go to Junkanoo beach to look for sea glass. A 10 minute walk gets you there, plus they are opening a Fat Tuesdays on the beach. Across from Senor Frogs is a beautiful new park. Impressive