Okay, try to figure this out. The top pic is well underground at the mining operation in Tombstone, AZ. The man in the pic is the tour guide, we are at least 60 feet down, I think they said it's more like 100. It's very dark in there, they have lights set up here and there, but this guy was doing this in almost total darkness. There are 2 pics of holes. They aren 't really holes, they're shafts where they were removing the silver. The explanation was that the entire crew of people were give 3 candles to work under there. That's ONLY 3 candles for everyone. He further explained that they were basically working in the dark, but could tell the "feel" of the silver. And yes, we got to feel the streaks of silver in the walls and it did have a unique feel to it - though not so unique that I would be able to identify it in the dark.
The odd looking machine? An engine that produces steam. It would "drive" the piece of machinery that drills a hole into the rock. They would then put a stick of dynamite into the hole and blow that portion of wall apart.
Dad was having a hard time getting back up out of there. It was a lot of steps up and even people in good shape were panting. Ihad to stand behind him all the way up to make sure he didn't end up falling.
I was pretty impressed that he still has such desire to go do such things considering that it is obviously not that easy for him to do.
We all had to wear hard hats under there - the ceiling in man places was so low I had to duck WAY down to get underneath.