The Amphitheater, an immense semi-circular wall of 1,000 feet in height, three miles above the mouth of Echo Canyon. Summit County, Utah., William Henry Jackson, 1869

Date: 1869. Collection: National Archives at College Park. The Amphitheater, an immense semi-circular wall of 1,000 feet in height, three miles above the mouth of Echo Canyon.... - NARA - 516640