The glass bottomed boats are at
Silver Springs. Although, watch out for the talking bear. He's kind of creepy.
Now, if you're into Mermaids, then there is only one place to go.
Weeki Wachee
If, however, you don't want a creepy talking bear or mermaids, may I suggest
BOK Tower
If you aren't interested in a creepy talking bear in a glass bottomed boat, mermaids drinking Coke under water or beautiful gardens in a peaceful setting, then maybe dancing chickens are your style.
Webb City no longer exists, but it was the king of tacky cool.