The Paiva River is a river located in the northern region of Portugal. It flows through the picturesque landscape of the Arouca Geopark, known for its stunning natural beauty and diverse ecosystems. The river is approximately 20 kilometers long and is a popular destination for outdoor activities such as hiking and kayaking. The Paiva River is particularly famous for its clear waters and scenic gorges. It is also home to various species of fish and wildlife, making it an important area for biodiversity. The river's surroundings offer numerous trails, allowing visitors to explore the unique flora and fauna of the region.