Dzungarian Gate
The Dzungarian Gate, also known as the Altai Gap, is a geographically and historically significant mountain pass between Central Asia and China. It has been described as the "one and only gateway in the mountain-wall which stretches from China to Afghanistan, over a distance of three thousand miles [4,800 km]." Given its association with details in a story related by Herodotus, it has been linked to the location of legendary Hyperborea.