Koberstein estate near Obererbach.	The Old Mill
Pictures of Obererbach with view of Koberstein: This link no longer exists

Thorsten Schmitz ( thoschi ) Tree on Geneanet about Johann von Koberstein.

This is the general area in Westerwald, Northwest of Frankfurt am Main

Here is a modern roadmap out of altenkirchen to the Koberstein Estate:

Arial Photograph of Koberstein Estate