We took a taxi (easy to get right in port) over to Paradise Island...$4 per person, went directly to Atlantis and spent a couple of hours looking around, visiting the casino and shops and being totally amazed at the lobby floor to ceiling aquariums. Didn't do any of the tours, but, saw enough to say we had been there. Didn't cost anything except the taxi fare. Taxis waiting at the door to go back to the ship. Easy "tour" to do on your own.