The Altantis Resort and Casino
is located in Nassau. Actually, it is located on a strip of land across a channel of water from Nassau. This strip of land is called Paradise Island.
When (or if) your cruise ship docks in Nassau, it will dock in a place called Prince Georges Wharf. You will be able to see the Atlantis Resort and Casino
from Prince George's Wharf if you look across the channel of water and see the very large buildings in the distance. You can get to the Atlantis Casino and Resort
by either water taxi (a big boat that ferrys people) or by a regular car taxi (which will get to Paradise Island) by causway bridge connecting Nassau to Paradise Island. Some people said that the car taxi is faster and easier.
I hope this was some help. Have a great time on your cruise