Board Thread:Suggestions forum/@comment-26444332-20160330162225/@comment-26236093-20160413062230

Faenor of the Silver Laurel wrote: It is likely that some remnants of the fortress of Himring survived the waters. After all, if Himring could survive the power of Angband in the form of many sieges(which would have had more devilry then either Saruman or Sauron could have contrived) I doubt some flooding would hurt it so much.

Indeed, perhaps also considerable portions of the Grave of Túrin Turambar survived the drowning of Beleriand. Chiefly the barrows that were made there, and the standing stones which denoted the graves of the Children of Húrin.