Wakulla Springs is a great place to see gators. They're everywhere. Sometimes, you'll see 12ft. gators just lying on the banks or swimming beside your boat. And if you're really lucky, you'll get a tour guide who will drive right up to the gators and make them hiss at you. And if by some slim chance you don't see a gator on the river, they have a huge stuffed gator on display in the hotel.
The park has more to boast than just gators, though. It's also got a display of mastodon bones that were excavated from the river. In addition, you can see old posters of movies filmed on the river such as the original Tarzan movie, "Airport 77," and The Creature from the Black Lagoon. And of course, the park has a great swimming area complete with a diving board that stretches out over the spring.
And if you've already seen the park, I suggest that you visit one of the canoe liveries farther down the river. I once saw four manatees on a single canoe trip down the Wakulla, and it was an experience I will probably never forget.