The mines of Blackwick are a series of caverns going deep into the mountain range at the center of Sangfielle.
Within the mines, stuff from distant pasts, potential futures, and far-off present can be dug up. This is economically valuable, as items such as cameras only exist within the world of Sangfielle from such sources and via reverse-engineering of the same; however, it is also risky. Places where valuable items emerge can at the drop of a hat change to a seam of ham or dirt, and once a generation, the mines used to close and devour everyone within them.
Occasionally, people have been known to emerge from the mines, presumably digging themselves out of the soil. Once, fire shot out of the mines for many hours.