The onjly thing to see in Nassau is the Atlantis, however, they charge you to go onto their beach, usae their pool or go through the diggs (aquarium). WE took the taxi over ($4) and the ferry back (also $4). It is a beautiful resort.
St. Maarten is our favorite island. .It has something for everybody -- beautiful beaches, scenic mountains, lots of shopping (including amazing jewelry stores), bars and restaurants. Renting beach chairs and umbrealls with a drink included can be done right on the beach shortly after you get off the ship. We rented a car so that we could show our friends all of our favorite places -- Orient Beach, Sunset Beach Bar where you can watch the planes land and a tour of the whole island(both Phillipsburg and Marigot). The shops in Phillipsburg are conveniently located close together along Front Street which is nice -- so you do not have to walk long distances to get what you want. Do not miss St. Maarten.
The tour showed us much of the island but the driver was not as well informed as some of the others we have had. Still, it is worth seeing the island.
Sapphire Beach was a nice beach to just relax and get in the water for awhile. You can rent chairs and buy lunch, snacks and drinks there. Taxis/vans come by frequently to take peole back to the ship.