I see you rented a car, Now for the non divers, While staying at Cobalt ask Divetech about the scooters. Non divers can take them into the water off the dock at Cobalt or turtle reef, Someone in the dive shops can slow them down for snorklers. They are a blast, also non divers can snorkle at Stingray city, I did that before I got certified. An intsructor will bring them up to you. Don't forget to check out the Turtle farm next to divetech's Turtle reef shop,non diver can check out the turtles while the diver does his or her thing. And also go see the Butterfly farm. Seven mile beach isn't very far from Cobalt, Get in the water about to your waist and scuff up the sand and watch the fish come to eat,don't forget your mask,. And go to the deserted beach, You can ask Divetech about a picnic there, Take the snorkle gear. Have Fun Turtle gal