See below for (slightly) more about the nat'l park. There was a deck over this oxbow lake and there were tons of turtles there! and you looked around and there were more coming! I was talking with some other people on the deck and we decided that they hear vibrations (or something) and people have fed them in the past and so they come beg for food. Begging turtles. That would be cool (and sad) if it were true.