Some of the most extensive limestone cave systems in Asia can be found in Laos. One of the most spectacular is the Konglor Cave in central Laos' Khammouane Province. There is a river flowing all the way through this huge 7,5 kilometers long cave and you can ride a small boat through it.

The limestone forest in Khammouane has the highest concentrations of caves in Laos, and in, Tham Pa Fa Cave, 229 Buddha images were discovered in 2004. If you want to explore off-the-beaten path caves, the Pha Laem trek near Thakhaek (Khammouane Province) is a good option.

Vientiane (Vientiane Province), just north of Vientiane Capital is also well-known for karst mountains and caves. 
In Luang Namtha's Vieng Phoukha, visit easily accessible but little known Phou Prasat or Tham Kao Rao Cave. The most famous caves in Laos are way up in Houaphanh Province's Vieng Xay district. These fortress-like caves served as a base for the Lao Revolutionary Forces during the Second Indochina War. Other notable caves are the Tham Pa Cave in Xieng Khouang Province and Tham Ting Cave in Luang Prabang Province.


Attapeu Bokeo Bolikhamxay Champasack Houaphanh Khammouane Luang Namtha Luang Prabang Oudomxay Phongsaly Salavanh  Savannakhet  Sayabouly  Sekong  Vientiane  Vientiane Capital  Xaysomboun  Xieng Khouang 

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