Lhasa Valley in Tibet. Lhasa has an elevation of about ft. and lies in the center of the Tibetan Plateau with the surrounding mountains rising to ft. The marshlands, mostly uninhabited, are to the north. Photograph by Herbert Wong
Lençois Maranhenses National Park located in Maranhão state of northeastern Brazil. Composed of large, white, sweeping dunes. Fresh water collects in the valleys between sand dunes, spotting the desert with blue and green lagoons.