treasurechest
Full Member
I think they were all silver. If I remember correctly, south of there was a town called Tropico that produced gold. As far as them all being man made, I'm positive. They still have the support timbers in them, most of them have been capped off, and you can't get into them. There's still a few you can get into It's a neat place to visit if you're on your way to Bakersfield, or you find yourself in Lancaster.