At the end of the invasion of Khwarezmia Empire, Genghis Khan chased Ala Ad-Din Muhammad to the Caspian sea, where he hid on an island and died several weeks later. However, none of the sources I can find ever mention the actual island that he died on.
I've always been curious since as far as I know there are not too many islands to speak of in the Caspian sea. The only real information I can find is that it was an Island close to the port of Abaskun.
What is the island and does it still exist today?