The correct answer is - Eiffel.
Vulkaneifel (Volcanic Eifel) is a remnant of the volcanic past in the Eifel Mountains Range in Germany. It is very easy easy to see that this region has been shaped by volcanic activities in the past because it has lots of typically volcanic landmarks, like lava streams, craters, tuffs. This region is located between the Rhine and Wittlich Depression, and is divided into three parts, Volcanic West Eifel, Volcanic High Eifel, and Volcanic East Eifel.
