PatW
Contributor
Well, Alexander Springs has a really small "cavern" with the emphasis on "small". It is a max of 28' deep and no special training is necessary. The spring is pretty small.
There are the ocean dive sites on the east coast: Jupiter, West Palm (with the Blue Heron Bridge), Pompano, and the Florida Keys. On the west coast, you can go to Venice Beach and dive for megladon teeth (large fossilized shark teeth). There is also Crystal River for gawking at Manatees. All of these is over an hour drive from Orlando.
There are the ocean dive sites on the east coast: Jupiter, West Palm (with the Blue Heron Bridge), Pompano, and the Florida Keys. On the west coast, you can go to Venice Beach and dive for megladon teeth (large fossilized shark teeth). There is also Crystal River for gawking at Manatees. All of these is over an hour drive from Orlando.