Concierge.com's insider take:
High above the Mekong River Valley, the natural citadel of the Bolaven Plateau is a cool escape from the oppressive heat below. Coffee and tea are the main crops: Be sure to sample the local varieties. Rivers run off the high plateau in all directions and then plunge from dense forests along the escarpment in a series of spectacular waterfalls, including Tad Fan, a 400-foot drop. There are few specific sights: Simply explore the countryside and tiny ethnic-minority villages.