The Nam Ou is a river located in northern Laos. It flows through the mountainous regions and is known for its stunning scenery, including limestone cliffs and lush forests. The river is approximately 400 kilometers long and is a significant waterway for local communities, providing resources for fishing and transportation. The Nam Ou is also a popular destination for tourists seeking adventure and natural beauty. Activities such as kayaking and boat tours allow visitors to explore the river's tranquil waters and surrounding landscapes. The river eventually merges with the Mekong River, contributing to the region's rich biodiversity and ecosystem.