Eastern Iran includes the provinces North Khorasan, Razavi Khorasan, South Khorasan, and Sistan and Baluchestan some of which share a border with Afghanistan and Pakistan. Some references also count Kerman Province to this region.
Dominated by deserts, this region is characterised by an arid or hyper-arid climate.
The major cities are, in descending order of population, Mashhad, Zahedan, Sabzevar, Neyshabur, Bojnurd, Birjand, Zabol, Chabahar, and Kerman.
