Salt Mines

Once a major producer of so-called 'white gold', Berchtesgaden has thrown open its salt mines for fun-filled tours (90 minutes). The brand-new SalzZeitReise exhibition opened here in 2007, and sees visitors donning protective overalls and taking a special train into the depths of the mine. Down below, the highlights include the crossing of a 100m-long illuminated lake containing the same concentration of salt as the Dead Sea, and the brightly lit, interactive treasure chamber where visitors learn about the history of salt mining in the Alps. It's usually only around 12°C down there, so bring a sweater.