The Black Forest is in the south-west.
It's westerly and southerly border is the river Rhine.
<a href="http://www.schwarzwald-tourismus.info/" target="_blank">www.schwarzwald-tourismus.info/</a>
<a href="http://www.badische-seiten.de/schwarzwald/" target="_blank" title="Map of the Black Forest">www.badische-seiten.de/schwarzwald/</a>