Darwin is in the Northern Territory of Australia: Crocodile country.
The ship offered a shuttle to the city center for $15 USD per person with a drop off at the Visitor’s center (VC). From outside the VC, independent tours were being sold for a crocodile experience and for the WWII experience. These tour operators allowed tourists to hold a boa constrictor and touch a crocodile. Hop-on/Hop-off (HOHO) Bus tours were sold outside the VC. (The humidity has really messed with my hair!)