The Road of Abandoned Things
On the outskirts of Comstock, Minnesota is a farming area with roads full of abandoned buildings and farmhouses. Not sure why there are so many abandoned buildings in one place. I am just going to assume that there was a massive outbreak of zombie like cows that terrorized the area forcing people to flee to the major cities. Then finally they were put down in a epic battle between farmer and livestock. I'm picturing something like the ending of 300.
It's the only logical explanation.