Сиангкхуанг
Xiangkhouang Province covers an area of and is mountainous. Apart from floodplains, the largest area of level land in the country is on the province's Xiangkhoang Plateau. This area is characterized by rolling hills and grassland whose elevation averages . The country's highest peak, Phou Bia (), rises at the south side of the plateau. Nam Et-Phou Louey is a National Biodiversity Conservation Area (NBCA) in the province covering an area of 5,959 km2, and overlaps into Houaphanh and Luang Prabang Provinces.