This spot is amazing. It's an old mine located in Park City on the ski resort. Only accessible in the summer, you can park down the road before the block, and it's about a 1-mile walk up. Many people only go to the larger section but further up the hill there is yet another building that appears to have an open mineshaft in it but I am not sure. There are also many other smaller buildings scattered about. The biggest bonus of this place is there seems to be not a single no trespassing sign so it appears to be legal to explore however I am not sure. To find it just search "silver king mine"

Was in that area years ago!


https://flickr.com.../72157657814651484

It's on my list this summer! Tried to go in the fall, but the snow always hits the mountains weeks before the valley.