zenith view of the salomon bridge crossing the red river, rio tinto, a railway bridge in the province of huelva and was originally

salomon bridge red river rio tinto railway huelva riotinto transportation copper mineral historical pyrite excavation locomotive sulfur sulfuric water oxide cooper infrastructures rails line tracks machinery metallic machine metal iron industrial structure rusty railroad architecture engineering rail old train construction industry landscape travel track steel heavy abandoned transport zenith view crossing province originally