Kalterherberg, near Monschau in the Eifel region, is very well known for its wild narcissi. Since however they are wild, you have to visit the region on the right moment. If you miss it, the region is still beautiful, but there's a chance you don't get to see any narcissi. If you're there on the right moment you get a beautiful region AND millions of wild flowers. Last year I kept an eye on a sight keeping an eye on the wild flowers in Flanders and Germany and managed to visit the region while the flowering was a bit over its climax but was still worth seeing.
You'll find all my Kalterherberg photos here on Pinterest and here and in the next post you'll find a selection.