Amul is the ancient and medieval site at the outskirts of the modern Turkmenabat, at the banks of the Amu Darya River, thriving particularly as a crucial transport hub for three main Silk Road caravan routes.

Destroyed in 1220 by Mongolian armies, the town revived in the XV c. as Charjui. The town plan of that period survived practically till 60-ies of the XX c. Remains of a medieval citadel or ark, on a 13 m high platform, the main kala or shakhristan which is itself on a raised platform of 20 m high, and a rabat can be observed.