There was a shortage of prison accommodation in the Victorian era, so long-term prisoners were transferred to provincial prisons, or to the dreaded hulks. The hulks were decommissioned warships anchored in the mud off Woolwich. They were dark, damp and verminous and few prisoners managed to escape. This is a cross-section of a hulk called the Defence, published in Henry Mayhew’s The Criminal Prisons of London, in 1862.
Several views of Libby Prison were taken from the land side, but this picture is unique in that it shows the building as it appeared from the river. Description from pddoc.com. I searched for this on bing.com/images
Andersonville was one of the largest prison camps during the American Civil War. It was built early in 1864 after Confederate officials decided to move the large number of Federal prisoners kept in and around Richmond, Va, to a place of greater security and a more abundant food supply. During the 14 months the prison existed, more than 45,000 Union Solders were confined here. Of these, almost 13,000 died from disease, poor sanitation, malnutrition, overcrowding, or exposure to the elements.