Radkan Tower in Razavi Khorasan
Radkan Tower in Khorasan Razavi Province is located 80 kilometers from Mashhad and on the road to Chenaran in the okd Radkan City. Based on historical evidences and studies conducted, Radkan Rod was built by Khajeh Nasir al-Din Tusi, the mathematician, astronomer, and great scientist of Khorasan. The historical Radkan Tower is the only tower with the ability of determining four seasons, leap years and beginning of New Year.
This elegant and historical tower was registered in the list of Iran’s national monuments on 15th of Dey 1310 with registration number 146.