Surprisingly, this town surprised me in a good way, even if it isn't an unmissable stop. However, due to its reputation, it was off to a bad start. We often hear of Mackay on account of its strong industrial and mining activity, quite devastating for the Grand Barrier Reef. The town is nicknamed "the sugar capital of Australia" as it produces a third of the country's sugar.
The town is very art déco, which makes it nicer than the majority of towns in Queensland. Amongst the building to see, I would nominate the Town Hall and The Historical Bank, typical colonial architecture. And for a pleasant walk, go to the Marina (a lovely lighthouse to photograph) or to the botanical garden.
The little "tip" to know: The green Eungella National Park, one hour west of Mackay, is the ideal place to see the extremely rare duck-billed platypuses. On our part, we didn't have the patience to wait but if you stay for a few hours, scrutinising the river, you will see them, according to the park staff.