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This cave, decorated with stalactites, stalagmites and flowstone consists of narrow  entrance, widening to single large passageway of about 250m long, extending to four levels. Moisture percolating from the celling maintains an awesome array of shapes and patterns. Villagers have interpreted some of the feature as evidence that this cave is the ancient abode of Khoun Lang; Nang Oua’s suitor in the legend of Nang Oua-Thao Khou Lou; a romantic tragedy famous throughout both Laos and Thailand.

Location: in Kasi District of Vientiane Province, along a new road connecting Kasi with Nan district in Luang Prabang province. This new road provides an alternative way of getting to the World Heritage Town of Luang Prabang for travelers coming fromVientiane or Vang Vieng, by passing the Phoukhoun mountain pass and significantly shortening the journey. It also is an excellent option for travel to Sayabouly from Vientiane.

At the southern end of Kasi town (240km from Vientiane; 60km from Vang Vieng) turn vest and travel 17km to Ban Houay San. At Ban Houay San, call in at the visitors Information Center. A further 2km will take you to the carpark at Khoun Lang Cave Nature Park.

 Tham Pou Kham

 Bee Cliff Cave Complex

 Tham Khan

 Tham Chang

 Ban Tham Xang Group

 Ban Pha Thao Group

 Khoun Lang Cave