The second-largest town of the region, 15 km (10 miles) south of Salzburg, Hallein was once famed for its caves of "white gold"—salt. "Hall" is the old Celtic word for salt, and this treasure was mined in the neighboring Dürrnberg mountain. You can get to Hallein by regular bus, by car along the B159 Salzachtal-Bundesstrasse, or by bicycle alongside the River Salzach. Once in Hallein, you can follow the winding paths of the oldest salt mine in the world at the Salzwelten
and pay your respects to Franz Gruber, the composer of "Silent Night," who lies in the only grave still extant next to the town's parish church.