Stone of the Hapless
From Tolkien Gateway
The Stone of the Hapless was the hallowed stone on the banks of the River Taeglin that commemorated Túrin and Nienor Níniel,[1] and Morwen their mother. It was also called the Standing Stone and Talbor.J.R.R. Tolkien, Christopher Tolkien (ed.), The War of the Jewels, "The Wanderings of Húrin" (see especially Notes 15 and 55)</ref>
Later, during the drowning of Beleriand, the site of the Stone of the Hapless did not drown (as predicted by Glirhuin, but remained as an island, Tol Morwen.[2]