Obvious underground development outside this gold mine in South Africa.

Who wants to live out in the hot sun anyway?

Trail of tears was about the gold.

"It is said that the gold was discovered by the Cherokee, and that a soldier saw a small nugget on a Cherokee lady’s necklace.  He inquired as to where it came from and she said from a creek at Coqua.  The word quickly spread and the Cherokee lands were quickly overrun by fortune-seeking whites.  The Cherokee complained to the federal government about their land being usurped, and a decade later, they were removed from the southeastern mountains and forced to relocate to what is now Oklahoma.  The mines at Coker Creek continued to produce their yellow treasure until the outbreak of the Civil War."

https://freepages.rootsweb.com/~gtusa/history/usa/tn/cokercreek.htm