Azerbaijan–Iran border
The Azerbaijan–Iran border (Azerbaijani: Azərbaycan Respublikası–İran sərhədi, Persian: مرز آذربایجان و ایران) is 689 km (428 mi) in length and consists of two non-contiguous sections separated by the 44-km long Armenia–Iran border. == Description == === Western (Nakchivan) section === The border starts in the north-west at the tripoint with Turkey on the Aras river, continuing along this river south-eastwards, through the Aras reservoir (created by the Aras Dam) and down to the western Armenian tripoint.