The Völklingen Ironworks are the world's only surviving smelting works from the Golden Age of the iron and steel industry in the 19th and 20th century. In 1994 these gigantic ironworks covering an area of 600,000m² became the first industrial monument to be inscribed in the UNESCO World Heritage list. Today, they are a cultural attraction, themed discovery park and science centre rolled into one.
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Yup, a most photogenic pile of rust ;-) An "ironworks" video is in the works already. I'll do an ambiance piece first and a proper documentary sometime next year, as this will require more research and understanding on my part.