The most interesting part of the my trip was going to the Qaen city.
I found There a very beautiful city.
Qaen (Ghaen) is a city in the South Khorasan Province of Iran. Qaen is also called the City of Saffron. Saffron from Qaen is prized for its unique aroma and strong colour.
Qaen is a place of great antiquity and complex history. The present city, which lies in a broad valley, was founded in the 15th century on the site of an ancient city. Later, the Uzbeks (a Turkic people) took possession of the city and held it until Shah Abbas I (1588-1629) expelled them. In the 18th century, Qaen fell under the control of the Afghans.
A mud wall surrounds the modern town. More affluent residential areas lie outside the wall. The city is a trading center, but it also has industries that produce felt and carpets. The surrounding area consists of hill ranges of 2,750 m running northwest-southeast and sinking to the Sistan depression in the south. The area is the main source of saffron in Iran, but it also produces grain, vegetables, and wood.
There are several ancient places around the town, such as the Tomb of Bozorgmehr Qaini, 5 km to the south.
Among the historic buildings, The Birjand Castle, is one of the most beautiful castle with a location and architecture that is unique. This castle is located in middle of city.
It's located in city and you can see easily.
The hexagonal Ziggurat of the Kolahfarangi or Mir Hassan Khan Castle is a unique landmark of Birjand. This building was originally the residence of Hassam-al-Dowleh but dates to the Zand Dynasty. This building is six stories high and only two floors are practically usable. The interior and exterior decorations are honeycomb plasterwork, flowerpot motifs and niches, are major decorations on this building. The forms and shapes of this building makes it one of the unique buildings of Iran.
I went there by plane . Birjand Airport is placed in suburban region of Birjand. Due to the geopolitical eminence of Birjand in the eastern parts of Iran, Birjand airport started operation in 1933 as the 3rd operational airport in Iran. Birjand airport offers non-stop daily flights to Tehran and Mashhad. It became an international airport after the first international flight to Medina, KSA in June 2008.