Premise: Dürnstein is a small town on the Danube river in the Krems-Land district, in the Austrian state of Lower Austria. It is one of the most-visited tourist destinations in the Wachau region and also a well-known wine growing area. The municipality consists of the Katastralgemeinden "Dürnstein, Oberloiben" and "Unterloiben".
Hypothesis: Durnstein is known for ice wine.