Ford Motor Company has had continuous operations in Louisville since 1913. This is the fourth cache in a series at or near past and present Ford plants.
If you find all five of the Henry and Louis caches, you are eligible to find the Bonus Cache!
Ford had its local operations at this site from 2 Feb 1925 until 13 Apr 1955 when the Louisville Assembly Plant was opened on Fern Valley Road. The photograph above was taken on the day that the plant opened. If you take a good look at the current facade, there are some really interesting architectual elements.
Like the rest of the area, the plant and the vehicles onsite were completely overwhelmed by the 1937 flood. During the Second World War, Ford built Jeeps here - this was when "Jeep" was short for "General Purpose", not a brand.
As for the cache, you are looking for a pill container.