Darwin is small but mighty. The CBD, which comprises a couple of parks, government buildings, and a network of shops and cafes catering primarily to tourists, is easily explored in a day. If your feet are sore by the end, it’s because you didn’t spend enough time sitting on a park bench and admiring the view.
After lunch in the park, I had a panic about how I was going to get to the Ghan railway station the next morning and went off in search of the bus terminal. When that was sorted (there's a shuttle that runs directly from Darwin CBD), I went to check out the wharf area. There you find ‘Survivors’ Lookout’, a gazebo with signs detailing the story of the WWII attacks. I learned that the first place hit was the post office, and that they had just gotten the last pool of evacuees off the day before.
A lift takes you down to the water level, where you can swim in the wave pool.
Or you can eat ice cream by the beach, which is what I elected to do because it was on my list, and what can I say; what's on the list must get done.
My feet were aching by the end of the day. Clearly I didn’t spend enough time admiring the view. This I made up for the next day, however…