![Rio Tinto [red river], Huelva, Spain. The red color comes from the iron deposits present on the Earth in this area. Iron mines were opened by the Romans more than 2000 years ago.](https://tripterest.com/uploads/pins/2014/12/medium/b5c3a172a702c63d305a919c7ec252de.jpeg)
Rio Tinto [red river], Huelva, Spain. The red color comes from the iron deposits present on the Earth in this area. Iron mines were opened by the Romans more than 2000 years ago.
Rio Tinto [red river], Huelva, Spain. The red color comes from the iron deposits present on the Earth in this area. Iron mines were opened by the Romans more than 2000 years ago.