The 496.3-meter-long Yarlung Zangbo Grand Canyon has an average depth of 5,000 meters, but drops in places to 5,382 meters. Since these figures came to light, world geography textbooks have had to be rewritten; Yarlung Zangbo Grand Canyon is the world's deepest, longest, highest and most dangerous one. In the past, the 5,133-meter-deep Grand Canyon of the Colorado ...