Continuing deeper into Kham you crest pass after pass, and plunge into valley after valley. Kham has been designed as if on purpose to keep out eastern intruders. It is sliced by mighty rivers: the Yarlung, Yangtze, Mekong, and Salween, all flowing north to south in deep parallel tracks--"magnificent corrugations" as they were called by one early explorer. Valley walls are lined with ancient pines . The fertile bowers at the bottom of these gargantuan cracks have made Kham into Tibet's breadbasket. Thus Kham is a stupendous mix of lush valleys, alpine pasture, and frigid, snowy heights.

Canyons Geographically
It is an area that the canyons of 5 big rivers run from north to south. Here, from east to west, separately lines the Dadu River canyons with an elevation of 2,800 to 3,600 meters, Yarlung River canyons with an elevation 2,500 to 3,400 meters, Lanchangjiang canyons with 3,200 meters high and Lu River canyons with 3,300 meters high.