Relax, it is just the shadows and sunlight on her knee!
Summitville, Colorado was the site of one of the first major gold discoveries in the San Juan Mountains. Summitville was located at over 11,000 feet, and harsh winters combined with varying ore quality made this a difficult location for both mining and settling a town. Imagine digging a hole and swinging a pic-axe at 11,000 feet! Tough men.
Morris Island, South Carolina. The shattered muzzle of a 300-pounder Parrott Rifle after it had burst, photographed in July or August of 1863.
A March, 1863 photo of the USS Essex. The 1000-ton ironclad river gunboat, originally a steam-powered ferry, was acquired during the American Civil War by the US Army in 1861 for the Western Gunboat Flotilla. She was transferred to the US Navy in 1862 and participated in several operations on the Mississippi River, including the capture of Baton Rouge and Port Hudson in 1863.