Right in the middle of Mitchell Street, Darwin's main tourist strip, is one of the stranger attractions in Australia: a working crocodile park housing some of the largest saltwater crocodiles in captivity. Crocosaurus Cove opened in 2008 and holds dozens of crocs in tanks visible through floor-to-ceiling glass — you can watch them from above and from the side, which gives you a sense of how much animal is below the waterline.
The signature experience is the Cage of Death: a clear acrylic cylinder lowered into the main croc enclosure, with the visitor inside. The cage is about the size of a phone box, and the crocodile comes extremely close. It is safe — the acrylic is thick — but it is a visceral experience and not for the faint-hearted. Sessions last about 15 minutes and must be booked in advance. The park also has swimming with crocs in a more conventional tank, and a range of crocodile-handling experiences at various levels of proximity.