Banlung City is the provincial capital of Ratanakiri Province in the mountainous northeastern corner. It is one of the poorest regions in the country with a sparse population of 150,000. Ratanakiri is known for its lush forests and rich biodiversity, though recent development is threatening the province's ecological health. Some of the most biologically diverse lowland tropical rainforest and mountain forest ecosystems of mainland Southeast Asia are located in Ratanakiri. Activities include excursions/treks to remote Khmer Loeu villages and jungle areas, waterfalls, gem mines, and Ratanakiri's famous Yeak Laom volcanic lake.