I feel as if the Aren Province and Tablo Province should be switched around. Arena is an Island. Always has been. It's governing powers are far different than anything else in the lands. 

Also, Genkai's Well. XD *Huehue* Shame on you Cupcake! 

Also.. Comrades' Keep burnt down. O.o Maybe some remnants are still there, who knows? Also, it's location... I know unknown to you mere mortals, but has always been located just off of Introduction Isle. Also, appears to be a small tunnel that goes from there directly to Mod Mountain. A Shortcut, if you will.