The town, or at least the main street that goes by the factory. As far as I know, no orange people were enslaved.
Seriously though, Milton Hershey was surprisingly progressive for his time. He built affordable homes for his workers and helped them become home owners. The school he built was originally for orphaned boys.
But in the meantime the park has grown from a neighborhood attraction to an east coast destination. I am always a bit amused when my coworkers vacation there.