Deepest valley / canyon
Yarlung Zangbo
The Yarlung Zangbo valley in Tibet has an average depth of 5,000 m (16,400 ft), but explorers in 1994 discovered that its deepest point was 5,382 m (17,657 ft). The peaks of Namche Barwa (7,753 m, 25,436 ft) and Jala Peri (7,282 m, 23,891 ft) are just 21 km (13 miles) apart with the Yarlung Zangbo River between them, at an elevation of 2,440 m (8,000 ft).
Its deepest point is more than three times deeper than the Grand Canyon.