Part of the Eifel that lies in Rhineland-Palatinate
The Eifel is a low mountain range bordered by the Rhine to the east and the Mosel to the south. The scenery includes some interesting formations caused by volcanic activity such as circular hills formed from vents and circular lakes in old craters.
Traveling through the Eifel is possible all year long.
People living there speak German and you might find some speaking French, Dutch and a lot of the younger generation will speak a bit of English.
By train or you might take buses leaving from bigger cities (e.g., Aachen) or leaving from the train stations.
Best by buses or you take a cab.
Many marked hiking routes, circular and long distance through the area.
Cycling. Many signposted bike routes through the region.
Related Wikipedia article: Eifel