Riverscapes (by drone and by camera) of the acid river Río Odiel  in areas that are not being used for industrial purposes or directly poisoned by industrial toxic effluents. Of course, the whole region is influenced by the deposits of iron, copper and sulphur and by the mining activities and thus only partly "natural". 

Whereas Río Tinto and Río Tintillo show a color spectrum ranging from yellow over orange and red to purple, Río Odiel presents itself in yellow, orange and green depending of course a bit on the light.