The coloured smokestacks are from National Steel Car, they make rail cars. I know a person whose husband works there and told me why for those coloured stacks.
The painter asked the company what particular colour that they wish to paint the smokestacks and they didn't care. So the painter who is gay decided to use the colour of the rainbow. Interesting story huh?! lol
Nice job flar!

This factory, Rheem, is closing soon (or is it already closed?). Guess why? It's a familiar story in USA.....opening up a factory in Mexico instead.