Kakadu is known for its lovely and life-sustaining wetlands, and is home to countless birds and fish, turtles, snakes and— possibly the scariest animal ever—estuarine crocodiles. Signs everywhere warn you not to enter or even get close to the water, frightening you off with a depiction of a toothy and malevolent-looking croc, jaws wide open ready to gobble you up should you dip a toe in the river.