Metal Detecting Underground from Minelab Treasure Talk

Now I certainly don't recommend going into old abandoned mines because I well know - better than most - how dangerous that can be. Normally it’s best to detect old dumps and ore piles on the surface when working around old mines, and even that requires a close eye on safety. However, I recently had a very special opportunity to do some gold detecting in the Original 16 to 1 mine in Alleghany, California. From Minelab Treasure Talk