The P. Tinto River is located in the southern region of Spain, specifically in the province of Huelva. It is known for its striking red color, which is caused by high concentrations of iron and other minerals in the water. The river flows through the Iberian Pyrite Belt, an area rich in mineral deposits, and has a length of approximately 100 kilometers. The P. Tinto River has been a site of mining activity for centuries, particularly for copper and gold. Its unique ecosystem supports various extremophiles, organisms that thrive in harsh conditions, making it a subject of scientific research. The river's unusual characteristics have also attracted tourists and nature enthusiasts.