The Kali Gandaki Gorge or Andha Galchi is the gorge of the Kali Gandaki (or Gandaki River) in the Himalayas in Nepal. By some measures the Kali Gandaki gorge is the deepest gorge in the world, being 5,571 m or 18,278 ft lower than Annapurna I which bounds it at one point. Gorge depth is difficult to define due to disagreement over rim height so this claim is disputed. The upper part of the gorge is also called Thak Khola after the local Thakali people who became prosperous from trans-Himalayan trade. Geologically, it is a downfaulted graben.