Note the scoring in the ceiling from the saws that carved the solid rock in to building material.

I feel like the description should talk about and unfathomable number of shelves with countless bottles of wine. However, to receive the Guinness award that was eventually earned, they were once counted. A proper and complete audit by hand, cataouging location, variety and vintage, and exact number of bottles. Let's just settle on a huge number of shelves with lots of bottles on each.