-In Norway, they one-upped that - the (now defunct) Røros copper mines operated for more than 300 years, and the spoil dumps from the processing are quite the s

-In Norway, they one-upped that - the (now defunct) Røros copper mines operated for more than 300 years, and the spoil dumps from the processing are quite the sight [0] Rather than tidying them up, though, they were put on the UNESCO world heritage list. (Along with the rest of the municipality of Røros; the mining museum is well worth a visit if you have an interest in industrial history and happen to find yourself in central Norway for some reason or the other.) [0] https://lokalhistoriewiki.no/images/Slagghaugene_p%C3%A5_R%C3%B8ros_05.JPG https://lokalhistoriewiki.no/images/Slagghaugene_p%C3%A5_R%C...