This 1 1/2 mile hike from the ghost town of Fairbank to the ruins of the Grand Central Mill follows an old town roadbed to the site. A number of these stamping mills were built along the San Pedro River during the silver boom in Tombstone. The silver-bearing ore was brought to the river by mule trains and then pounded to a fine powder by huge iron stamping rods before being processed with mercury. The masonry work of the foundations of this mill is still clearly visible.