In this video, you'll get an aerial tour of the site of what was once the world's largest factory. The Ford River Rouge plant in Dearborn, Michigan was made of 93 buildings which covered an incredible 16 million square feet. It initially was a steel plant, then integrated forward into parts and finally to fully assembled vehicles beginning with the famed Model A in 1927. It employed an incredible 100,000 workers at its peak. The site closed in 2004 and was more or less demolished by 2008.