Is it ALL gone?

[Mithadan]

Small fragments of Beleriand remained above the waves, though it has been debated whether the drowning of Beleriand occured at the end of the First Age or gradually, culminating at the overthrow of Numenor.

Lindon corresponds roughly to Ossiriand, though many of the rivers of that land are no more. The island of "Himling" (so labelled apparently incorrectly on several maps) is the top of the hill, Himring where Maedhros' fortress stood. Tol Fuin (referred to but not appearing on maps) is part of the highlands of Dorthonion. It is said that the grave of Nienor/Niniel and Morwen stands above the waters as Tol Morwen. Someone has mentioned, without providing any textual reference, that the summit of Haudh-en-ndengin also rises from the waters.

I have seen an overlay style map on another website and will try to link it here later.