Middle Earth maps/geography

[Elrian]

The sea of Rhun, the Inland sea northeast of Morder, beyond it I think is Far Harad. I read somewhere that Cuivienen was beyond it. In the Chapter Cirion and Eorl in Unfinished tales, it tells of the Wainriders that King Onedher of Gondor defeated, they went into the lands beyon Rhun and multiplied unknown to Gondor, In Cirions time they came out of those lands and began drifting towards eastern Mirkwood, slaying or driving forth up the running river into the forests. That is when Cirion enlisted the aid of Eorl. Hope that helps you some. It was also into those lands beyond the Sea of Rhun(the East) that the Blue Wizards went into when they arrived. Not much is told of them either.
Aragorn mentioned that he too had been into those lands where the stars were strange.