An alligator at Everglades National Park - you see them everywhere! I recommend taking an airboat safari through this park. The amount of wildlife (cranes, turtles, alligators, etc) is impressive. It's cheap too!
I saw a lot of these when we went through the Everglades. They had high fencing up in a lot of the area to keep them from entering the roads. Especially though Alligator Alley.