Zibad (, also Romanized as Zībad) is a village in Zibad Rural District, Kakhk District, Gonabad County, Razavi Khorasan Province, Iran. At the 2006 census, its population was 4243, in 1701 families. Zibad, which means beautiful in Persian, was a famous ancient area in Shahnameh. According to Shahnameh Ferdowsi (around 1000 AD), it was the place of a famous war called Davazdah Rokh(12 hero) between Iran and Turan. Zibad also has an ancient qanat that may be more than 1600 years old. Zibad famous product its saffron ,watermelon ,melon, rice and in the past also opium production. its ancient castle which was the shelter of the last emperor of sasanian iran, Yazdegerd III, the place of three ancient wars, and its Mithraism monument. its Qanat and dar e soufe a famous mountain wall rock, similar to Taq-e Bostan its water clock which had been in use continuously from 400BCE until 1950. Its Watermill producing flour and crushed wheat. The ancient water mill was at work until 1984 and destroyed for the construction of a dam. According to Callisthenes, the Persians were using water clocks in 328BCE to ensure a just and exact distribution of water from qanats to their shareholders for agricultural irrigation. The use of water clocks in Iran, especially in Zibad, dates back to 500BCE. Later they were also used to determine the exact holy days of pre-Islamic religions, such as the Nowruz, Chelah, or Yaldā - the shortest, longest, and equal-length days and nights of the years. The water clocks used in Iran were one of the most practical ancient tools for timing the yearly calendar. . Kūh-Zibad The mountain of Kūh-Zibad is located near Zibad, and is the second-highest mountain in Razavi Khorasan Province. Kūh-Zibad is famous because of some great historical events. its peak is called Tir Mahi The terrain around Kuh-e zibad is mainly hilly. The highest point in the vicinity is above sea level, southeast of Qole-e Tir mahi. Around Kuh-e Zibad is very sparsely populated, with 5 inhabitants per square kilometre. Nearest society zibad, north of Kuh-e Zibad. The neighbourhood around Kuh-e Zibad is barren with little or vegetation. In the neighbourhood around are unusually many named mountains and valleys. A cold steppe climate prevailing in the region. The average annual temperature in the area is 17 °C. The warmest month is July when the average temperature is 30 °C, and the