Near Pak Ou the Tham Ting and the Tham Theung are caves overlooking the Mekong River, 25 km to the north of Luang Prabang. They are a group of two caves on the west side of the Mekong river, about two hours upstream from the centre of Luang Prabang.
A nice trip by boat on the Mekong to visit these caves.