Near Ali Sadr Caves you can meet many people selling ice creams. You'll say: 'Hmmm... that's quite usual.' Yes it is, but I never ate ice-cream like I ate there. Iranians there were saying that it is with something called 'cardamon,' still I do not know what it is. It was like small strips of something what tasted very sweet. After that experience, I never found ice cream like that in Iran (and I tried to). It was really delicious.