I went to this park in the historic section of my town and I kept on finding weird bits of iron all over the place. My friend found a horseshoe-like piece of metal about 12" deep. There were a ton of deep signals. I also fount 2 dimes from he 1960's, but none were silver. It seems like a wagon blew up there. If anyone wants to hunt there it is larry J. marsalli park, santa clara, CA. By the way I wouldnt hunt there in winter because the ground is extremely muddy.