In an effort to be comprehensive, I had dinner in a very unknown three-star restaurant, in Germany by the French and Luxemburg borders: I was highly rewarded.
I have no idea what this meal was so good. Ingredients and technique are high quality, but not unparalleled. The pictures suggest a lack of stylistic unity. But that is not how it was. It was festive, masterfully composed, both in each dish and on the whole of the meal. Wines, many of them local, were wonderful. It was absolutely festive and wonderful. The whole thing is located in a medieval castle run by a young and enthusiastic team. And, by three star restaurants standard, it was not even expensive, as the tasting menu was around 150 euros.
Here are some pictures. I highly encourage travellers to give it a try.