Mining company buildings at Lees Ferry.

Mining for meteor at meteor crater.

Flooded mine at Silverton.

Black and white photograph of a man working in front of a cave opening on a hillside.

Mule at mine near Clinton, Indiana.

Old mine near Clinton, Indiana.

Water discharge at Victoria Mine, an abandoned copper mine in the Upper Peninsula of Michigan.

Water discharge at Victoria Mine, an abandoned copper mine in the Upper Peninsula of Michigan.

Water discharge at Victoria Mine, an abandoned copper mine in the Upper Peninsula of Michigan.