Schloss Buerresheim, Nettetal, Mayen
This castle is located in the Nettetal, near Mayen in the Eifel.
It has a beautiful museum inside.
Opening times can be found here.
You can take a nice walk from Mayen or St. Johann.
A good place for Lunch / Dinner is the Hammes Muehle, just a few meters away as well.
I suggest Forellen - very good!