The River Rhymney is a river located in Wales, flowing through the Rhymney Valley. It stretches approximately 20 miles and is known for its scenic beauty and rich history. The river begins near the village of Rhymney and eventually joins the Bristol Channel. The River Rhymney has played an important role in the local economy, particularly during the Industrial Revolution. It served as a vital waterway for transporting coal and other goods. Today, the river is a popular spot for outdoor activities, including walking, fishing, and birdwatching, attracting both locals and visitors.