Yea. In ancient, Azad kooh was higher than Damavand. a dragon came to Iran and look for some where to live. He first went to Azad kooh but the mountain didn't accept him so he went to Damavand and ask to have place for home. at first Damavand didn't accept but at last it did with a clause. Damavand asked for a piece of Azad kooh which make it higher than Damavand and Dragon went at night and took a rock for Damavand. The dragon then made his home in Damavand and that is why Damavand smokes.
Interesting ... anyway I read this from here (http://www.magicline.blogfa.com/cat-8.aspx) but mahdi doesn't know the reference too.