Mannheim, where I live, has an annual Christmas market, as do many German towns and cities. What makes it special and slightly relates it to gardening is the fact that it takes place in what Mannheim itself touts as Germany's largest art nouveau (Jugendstil) complex, including Mannheim's landmark, the art nouveau water tower; a large cascading fountain; the Rosengarten, Mannheim's concert hall; and very beautiful gardens with trellised passageways, art nouveau lamps and sculptures.
The Christmas market is grouped around the water tower, located at the end of Mannheim's main shopping pedestrian area. It's a favorite spot for shoppers to stop for a glass of mulled wine (Glühwein), a bratwurst, or to purchase baubles for the Christmas tree and other gift items.
Here you can see the Rosengarten concert hall in the background with some of the trellised walkways, art nouveau lamps and the cascading fountain (now empty in winter) in the foreground (click to enlarge).
The next photo, taken later in the evening, gives an impression of the market around the now lit-up water tower.