Old Mine Tunnel Carved Into a Black Hills Hillside

Abandoned gold mine entrance carved into a rocky hillside in the Black Hills, South Dakota.
Abandoned gold mine entrance carved into a rocky hillside in the Black Hills, South Dakota.

This abandoned mine entrance in the Black Hills of South Dakota is a relic of the region's 19th-century gold rush. Carved into the hillside, likely by hand or with early blasting techniques, the opening once led to mineral-rich veins sought for gold, silver, and iron sulfides.

Taken July 2019