Rio Tinto
37.7000°N, 6.5667°WOPEN YEAR-ROUND
A Spanish river stained deep red by acidic, iron-rich mine runoff, its extreme chemistry studied by NASA as an analogue for early Mars.
Nature & WildlifeNatural Wonders
A Spanish river stained deep red by acidic, iron-rich mine runoff, its extreme chemistry studied by NASA as an analogue for early Mars.