We have had some really neat cloud formations all day today. Tonight I happened to be going past the Steel Mill at sunset and the sky was looking great.
@yaorenliu Yes it is out at Glenbrook - it is about an hour south west of Auckland City, on the southern end of the Manukau Harbour. It uses the iron from the black sand on the west coast beach and there is an iron ore extraction plant in the nearby forestry area. The iron ore is pumped to the mill in a 'slurry line' pipe (about 10 kilometres long).