This site is the original Poldice Arsenic Works (from 1870s) which in 1900 the plant and site was sold for scrap. The site was continued to be worked and used as a Arsenic Works and mineral treatment mill site for the Parc-an-Chy Mine. The mill was finally dismantled in 1932. Most of the obvious buildings are from the Poldice Arsenic Works.
Note: I know the site is currently classed as a factory which is not entirely correct, however at the moment there is no 'works' type