Hi- I have taken a taxi over to Atlantis once on a cruise and I just got back from an actual trip to Atlantis. When we weren't resort guests we were able to walk around the inside of the hotel, but you are NOT allowed to walk outside by the pools, water park, etc. Our quick trip over to Atlantis made us decide that we one day wanted to come back to stay. Unless you like to gamble or go to a cool aquarium in there (it's called the dig and for non-resort guests during the day you have to pay), that's about all that you can do.