The Son River is a significant waterway in central Vietnam, flowing through the Quang Binh Province. It is known for its stunning natural beauty and is a tributary of the Ma River. The river stretches approximately 240 kilometers and is surrounded by lush landscapes, making it a popular destination for tourists and nature enthusiasts. One of the river's most famous attractions is the Phong Nha-Ke Bang National Park, a UNESCO World Heritage site. The park features impressive limestone caves and diverse ecosystems, with the Son River serving as a vital resource for local communities and wildlife.