In the early 20th century, Midwestern cities were booming. There were plenty of jobs in the burgeoning manufacturing industry, where everything from meat to motorcars was being produced at speeds never seen before. But in the century since, new technology and cheap labor have changed the face of manufacturing, luring factories to foreign shores. Although some of these plants have been preserved, others, once the jewels in the Midwestern crown, lie abandoned. Read on to see the haunting photos of