Quhistan (Persian: قهستان) or Kohistan (کهستان, "mountainous land") was a region of medieval Persia, essentially the southern part of Khurasan.
Quhistan was a province in old days with a rich history in Persian literature, art and science.
Safron, berberies (Zereshk) and jujube (Annab) are among the famous agricultural products that are exclusively produced in Ghohestan.
Hakim Nezari Ghohestani,[1] Sima Bina[2][circular reference] and Professor Reza Ghohestani[3] are among famous people who are originally from Ghohestan.
Dagestan in the North Caucasus was previously and originally named "Quhistan", which has the same meaning as Dagestan: dağ and kuh are the Turkic and Persian words for "mountain", respectively.