According to the Ynglinga saga, the euhemerized version of Asgard lies to the east of the Don (Tanais) river. The saga's 1844 translator, Samuel Laing, said that its location is identified by some scholars with "the modern Assor". Asgard, even in its euhemerized version, of course never really existed, but still it would be interesting to know where Assor actually is. I haven't been able to find any reference to a place named "Assor" at all, despite googling it thoroughly...