Ruins of the gold smelters at Chillagoe Mungana National Park, Chillagoe. According to Wikipedia, Chillagoe has one of the most diverse geologies on the planet and mining has been a major activity at Chillagoe in the past. 60,000 tons of copper
, 50,000 tons of lead
, 181 tons of silver
and 5 tons of gold
were processed at the smelters between 1901 and 1943. There is very little mining activity in the region now.