Framed by the Mekong river to the west, Vietnam to the east, Laos to the north and Mondulkiri to the south, the Ratanakiri province has become Cambodia's top eco-friendly tourist destination. On these fertile "red lands", you'll find neither temples nor vestiges of ancient civilisations, but rather a nature programme of waterfalls, hikes in national parks and a glimpse of the lifestyles of its ethnic minorities. The capital, Ban Lung, is the starting point for all excursions in the region.