These are the towers that were part of the tramway at the Keane Wonder Gold Mine. The cable that carried the buckets of ore down the mountain were still in place in some of the towers. During its brief lifetime, the Keane Wonder Mine produced over 1 million dollars of gold and silver, no small amount of money in the early years of the 20th century. The mine was active from 1906 until 1912. The National Park Service has closed the area around the mine in recent years due to surface collapse and toxic wastes in the area.