The mighty upper reaches of the Dong Nai River carve into a basin hundreds of hectares wide, surrounded by rolling hills. In the middle of this area lies a sacred site stretching about 17km along the left bank of the river, from Quang Ngai commune to Duc Pho commune. Before archaeologists arrived in 1985, people who had migrated to the area for economic reasons had already found stone statues, pottery fragments, broken bricks and tiles, and stone linga and yoni genitalia.