Phu Chong-Na Yoi National Park is located in Buntharik, Na Chaluai and Nam Yuen of Ubon Ratchathani Province

Ubon Ratchathani Province

-History:The area was part of the Khmer Empire. Before the late eighteenth century, this area evidently was outside Siamese or Thai Ayutthaya Kingdom....

, northeastern Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

. Established in 1987, it is an IUCN Category II protected area, measuring 686 square kilometres (264.9 sq mi). Situated in a mountainous area, the park borders Laos

Laos

Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...

 and Cambodia

Cambodia

Cambodia , officially known as the Kingdom of Cambodia, is a country located in the southern portion of the Indochina Peninsula in Southeast Asia...

. Natural features include the cliffs at Pha Phueng., and the 40 metres (131.2 ft) Bak Teo Yai Waterfall.