The Côa River is located in northeastern Portugal and is known for its stunning natural beauty. It flows through the Côa Valley, which is famous for its prehistoric rock art, making it a significant archaeological site. The river is a tributary of the Douro River and is surrounded by picturesque landscapes, including vineyards and hills. The Côa Valley Archaeological Park was established to protect and showcase the ancient engravings found along the riverbanks. These engravings date back to the Upper Paleolithic period and provide valuable insights into early human life. The site is recognized as a UNESCO World Heritage Site, attracting researchers and tourists alike.