The Côa River is located in northeastern Portugal and is known for its scenic beauty and rich cultural history. It flows into the Douro River, contributing to the region's diverse ecosystems and landscapes. The river is approximately 100 kilometers long and is surrounded by hills and valleys, making it a popular destination for outdoor activities. The Côa Valley is particularly famous for its prehistoric rock art, which is recognized as a UNESCO World Heritage site. These ancient engravings provide valuable insights into the lives of early humans in the area. The river and its surroundings are also important for biodiversity, supporting various plant and animal species.