Rattanakiri is situated atop the northeast plateau, bordering Vietnam to the east, Laos to the north, Stung Treng to the west and Mondulkiri to the south. A scarcely populated province, Rattanakiri shows considerable promise as an eco-tourism destination with plentiful waterfalls, volcanic lakes, a large national park and a number of waterways, all of which can be explored from the provincial capital of Ban Lung.
(http://www.travelfish.org/location/cambodia/northeastern_cambodia/ratanakiri/ban_lung)