@ Crocosaurus Cove, Darwin.
All the big crocs there have a name – one of them is Burt, a veteran 80-year crocodile that starred in the original Crocodile Dundee movie. Visitors can even swim with him (protected by a reinforced acrylic cage), but the price ($150) is somewhat outrageous. There is even a couple of crocs, named after prince William and his girlfriend Kate. Lovely couple.
Twice a day, you get to see (and maybe help) feeding the crocodiles (so if you want to get rid of your mother-in-law…).