Moonta is the most interesting of the Copper Coast towns on South Australia's Yorke Peninsula. It grew fast after copper was found in the 1860s, drawing Cornish miners, Methodist chapels, engine houses, and a hard-working culture that still gives the town its nickname: "Australia's Little Cornwall."
The real reason to come is Moonta Mines, just inland from the town centre. The old mining landscape has ruins, tailings heaps, walking trails, and the Moonta Mines Museum, which tells the human side of the boom better than a bare list of dates ever could. The Moonta Mines Tourist Railway makes the spread-out site easier to read.
Moonta is not polished in the way bigger heritage towns can be. That helps it. The streets are quiet, the old stone buildings feel lived-in, and the mining ruins still sit close enough to the present town to make the copper story feel local rather than packaged.