River waters turning to blood might be something out of an apocalyptic nightmare, but, fear not: A river in France is not red with blood, but rather with salt. A lake in the Camargue in southern France — a river delta where the Rhône meets the sea — has turned blood red, and scientists believe that the change in hue is due to a natural phenomenon, the New York Daily News reports. The high concentration of salt in the form of salt flats turn the normally blue water a deep crimson shade. Russian photographer Sam Dobson captured images of the the blood-red waters and detailed his sightings. “Every small branch is covered with crystals. with the red water as a background it looks like something extra-terrestrial,” he said, according to the Sun. “I was just overwhelmed with emotions the whole time I was there. Despite my numerous travels, I have never seen anything like this before.”