Walls of the Sun
From Tolkien Gateway

Walls of the Sun by Šárka Škorpíková
The Walls of the Sun or Mountains of the Sun was a great, curve-shaped mountain range in the Land of the Sun, in the far East of Arda. It corresponded symmetrically to the mountain range Pelóri on the land of Aman, but not as tall.[1]
Other versions of the legendarium[edit]
In earlier writings, a great mountain Kalormë was in the Land, which seemed to correspond to the Oiolossë in the Aman[2] although it is not specified in a mountain range.
References
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Shaping of Middle-earth, "V. The Ambarkanta: Of the Fashion of the World"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Book of Lost Tales Part One, "IX. The Hiding of Valinor", pp. 212, 225