River Cennen is a river located in Wales, flowing through the scenic Brecon Beacons National Park. It is known for its picturesque landscapes and rich biodiversity, making it a popular spot for nature enthusiasts and hikers. The river eventually joins the River Towy. The river is approximately 10 miles long and is characterized by its clear waters and limestone formations. It plays a vital role in the local ecosystem, supporting various wildlife species. Additionally, the surrounding area features historical sites, including the nearby Carreg Cennen Castle, which adds to its cultural significance.