They're in the flat rocks that extend a little ways offshore near the Interpretive Center. The river doesn't have to be all that high to cover them. It's one of the largest naturally exposed Denovian fossil beds in the world; really cool to walk around on.

Ditto on the Slugger Museum. If you like baseball you gotta see it. It's also their factory, so if you go, take the tour. And Slugger Field is a great place to see a ballgame. The Bats' season runs from early April 'til around Labor Day. It's a beautiful ballpark with a great family atmosphere.