This is the famous tunnel at the end of Cellar 20, sitting 15 or so metres underneath the Penfolds Magill Estate winery in the eastern suburbs of Adelaide.
This cellar contains thousands of bottles of premium Penfolds wines along the sides, as well as wooden display cases at the end of the tunnel, which exhibit every vintage of the iconic, heritage-listed Penfolds Grange from the experimental 1951 vintage through to the current (as of January, 2014) 2008 vintage.
Between the display cases is a large tribute to Max Schubert, the creator of Grange.
Being in Cellar 20 was a fantastic experience, and seeing every vintage of Grange in the one location (worth perhaps $200,000 or more) was also a unique experience. Very few complete collections of Grange exist.
The cellar leading up to this tunnel is where dozens of hogsheads (300-litre oak barrels) sit, in which Grange and Bin 389 undergo barrel maturation before bottling and release.
At the time of our visit, the 2013 vintage of Grange was maturing in around 30 Quercus alba hogsheads. Grange 2013 will be released in May of 2018.