The Everest of Rivers
The Yarlung Tsangpo Grand Canyon is the deepest canyon in the world, plunging to a maximum depth of 6,009 meters (19,714 feet). At 504.6 kilometers (313.5 miles) long, it is one of the world's largest. The Yarlung Tsangpo River carves this immense channel as it flows from the Tibetan Plateau, dropping steeply in elevation. As the river snakes around the 7,782-meter Mount Namcha Barwa, it creates the "Great Bend," a section of extreme geographical forces and nearly impassable terrain. In this short stretch, the river's elevation plummets from 2,900 meters to just 660 meters by the time it crosses into India, where its name changes to the Brahmaputra. This dramatic drop in elevation created a puzzle for geographers and fueled a century of speculation about the existence of a massive, undiscovered waterfall.
A Century-Long Search
For decades, the "falls of the Brahmaputra" was a geographical mystery. Early 20th-century British explorers, hearing reports from Tibetan locals, became convinced a giant cataract must exist within the gorge's hidden inner sanctum. A Sikkimese explorer named Kinthup, working for the British in the 1880s, reported a waterfall 150 feet high. This claim, however, was not widely believed at the time. In 1913, Captains Frederick Marshman Bailey and Henry Morshead led an unauthorized expedition into the gorge, mapping its course and confirming the Tsangpo was the upper section of the Brahmaputra. They found waterfalls, but the highest was only about 30 feet, a disappointment that failed to solve the mystery of the river's massive elevation drop. The area was largely inaccessible, closing to outsiders for much of the 20th century.