The Tham Nam, also known as the Water Cave, is a popular destination in Vang Vieng, Laos, about 15 kilometers north of the city. It is a part of the cave system in the area and stands out for its use of ropes to navigate through. Tubing inside the Tham Nam, visitors can admire the stalactites and the clear water of the cave. Recommended attire includes a hat, sunscreen, clothes, shoes, and sunglasses. Visitors should also bring these items along with them. There are terms and conditions to watch out for and some notes to read up on before visiting. Overall, the Tham Nam is a fascinating tourist attraction in Vang Vieng.