The hellish mines of the 1980s Brazillian gold rush

Source

Here is the rest of the [album](https://imgur.com/a/xYVUH)

From the Wiki on the Serra Pelada mine…
“Because of the chaotic nature of the operation estimating the number of miners was difficult, but at least 100,000 people were thought to be present, making it one of the largest mines in the world”