15 Mysterious Places That Resemble Alien Planets

15. Rio Tinto, Spain

The first likeness that comes to mind when one lays eyes on Rio Tinto is that of a body of water in Mars, not in Spain. But in the southwestern region of the land of bull fights it lies, the water emitting a strange rust color and surrounded by rock formations. Scientists have observed that the rust color is from minerals such as iron found in the river’s depths. Added to that, the water is highly acidic, making it dangerous to dip your hands into.
15. Rio Tinto, Spain