what damo said is correct. There are two paths to the parks
First as said above you take elevator to third floor lobby and walk across to the Palm restaurant and walk out the door by the Palm. The compelling reason is to stay in the air conditioning as long as possible but if you like humidity you can also walk out the front door and make a left. Either way walk down the stairs to the parking lot and walk across it to the bus stop and continue to City Walk. About a 5 to 7 minute walk.
The second path is taking the elevator to 1st floor- walk out the door to the pool and follow the path to the left walking past the large chess board and the cabanas and the hot tub and kiddie pool area to the gate at far left corner. Walk path to city walk. This walk is about same time and distance and is very pleasant. It will seem longer because you will want to stop and look at the plants and the river.
The third path was a gate on the other side of the pool area by the bar and water slide. It was a a much shorter distance but closed after the hurricanes of 2004.