The Widow Harun
The Unapproachable East
Not to be confused with The Utter East, this is a term for the eastern tier of nations that form a border march between Faerun and The Endless Waste. It is generally held to comprise Narfell, Rashemen, Thay, The Great Dale, Thesk and Aglarond.
The Unapproachable East is described in much more detail in the Forgotten Realms core books and supplements. Please consult these if you wish to learn more.