All of theme parks here in Orlando are awesome. Even some of the tourist areas are rich in pokestops (International drive) and worth the walk. However if you travel to Orlando and are a fanatical GO player you simply have to make a trip out to Kissimmee lakefront park in downtown Kissimmee one day (or night before 10pm). It's *insane* how often rare pokes spawn there. I just found out about it last week and have been twice already and each time I fill more holes in the dex. The cool thing about the location is there are very few rats/pidgeys/weedles, but instead all the water types (psyduck, starmie, carp, horsea, etc.) are all over the place. Each trip you'll catch a seal, dratini, and more too. Last trip I caught my first Blastoise :). It's such a hot spot that all of the stops there are lured up most all day long as everyone in Orlando knows about it.
In fact, it's so busy there that some locals are now calling for the removal of stops so the crowds will go away. Sadly some people are idiots (like all the smokers dropping their butts in the park) and leave trash lying around so I can understand their complaints. Until then though it is *the* place to play in Orlando :D