From the Wikipedia page 
Vulkaneifel (German pronunciation: [vʊlˈkaːnʔaɪfl̩]) is a district (Kreis) in the northwest of the state Rhineland-Palatinate, Germany. It is the least densely populated district in the state and the fourth most sparsely populated district in Germany. The administrative centre of the district is in Daun. Neighboring districts are Euskirchen (North Rhine-Westphalia), Ahrweiler, Mayen-Koblenz, Cochem-Zell, Bernkastel-Wittlich, and Bitburg-Prüm.