The Aremberg is, at 623 m above sea level, the highest mountain in the Ahr Hills or Ahr Eifel. It lies in the district of Ahrweiler, Rhineland-Palatinate.
Wikipedia https://en.wikipedia.org/wiki/Aremberg_(mountain)
Address (Unnamed Road), 53533, Germany
Coordinates 50°25'1.999" N 6°48'51.001" E