You can see what’s left of the Renz Prison Farm just across the river from Jefferson City, Missouri. I’ve been meaning to take a closer look for years and yesterday my friend George poked around for a a few minutes but there wasn’t much left to see. (There’s a bit of the history in this Vox article from 2015.)
The building is too far gone to get much of an idea what it was once like. I didn’t see many individual cells and assume the large open rooms were dormitories. This four minute video (not mine!) offers some different views: