The Riesling grape is believed to be indigenous to Germany, and has been planted there since the fourteenth century. Riesling does the best in Germany and in California, but is also grown in the Alsace region of France, in Austria, Australia, Canada and New Zealand.
Riesling is the most planted grape in the Rhine Valley in Germany, and people who talk about a "Rhine Wine" (that rhymes!!) are talking about a Riesling. Riesling and Rhine Wines were very popular in England in past centuries. In fact in Hamlet, the wine that the Danish court gets drunk with every night is a Rhine Wine!
Most German riesling wines are labeled "Kabinet". This is simply the most basic category of wine in Germany, as compared with special types of wine which are harvested late in season to have added sweetness.