Sirdan old plane tree is a tree in Sirdan city and Lower Tarem part of Qazvin province. This old tree is located in the eastern end of the city and near the traditional gardens of Sirdan. This old sycamore tree was registered on 8/28/93 under the title "Sirdan old sycamore tree" and number 207 in the list of national natural monuments of the country. [1] The age of this national heritage is estimated to be about 500 years, but the local people They know it much more and about a thousand years. Table of the tree's appearance characteristics: The average diameter of the trunk is 338 cm, Trunk circumference 1060 cm, The height of the tree is 28.2 meters