Every year on May 1, a line forms outside the cellar door of Penfolds Winery in the South Australia town of Magill for the launch of Penfolds Grange, Australia’s more-than-stellar answer to the best Bordeaux of France. Bottle-aged for five years before being released, Grange is a Shiraz meant to be cellared for decades. The wine takes its name from the picturesque stone cottage where the winery’s founder, Dr. Christopher Rawson Penfold, and his family lived on their 500-acre Magill Estate vineyard in the mid-1…