The water smell is in Disneyland water rides too, so it's not just a Florida thing. It must be something in the way they treat the water. It's a great smell. And you can pick up some of the water smell at the end run of Big Thunder at the drippy cavern part.
I pick up on something similar to the Monorail in several Tomorrowland attractions. It's the smell of the future.
I was in the mountains a couple weeks ago at a festival and they were barbecuing turkey legs. That smell brought DW instantly to mind.