Imamzade "Ali Asghar Ibn Musa Alkazem" is located on ZarAbad village that is part of Rudbar Alamut and 86Km of Qazvin, every year a lot of people in Tasu'a & Ashura come from different cities & villages tovisit it. There is an old sycamore in front of the shrine which is known to bloody sycamore .local ones believe that in the time of Ashura's morning izan,blood is leaked from it's branches, mouring rituals are observed in the region and they are really unique .the ceremony begins from morning of Ashura and continues until Ashura's morning night of Ashura,Hosseini mourners beating the chest at the yard until morning.