The Spiral cellar system was first developed by a Frenchman, Georges Harnois, in 1977, who recognized that few modern houses had cellars, but people still wanted somewhere to store their wine. If you’re one of those people who are serious about wine collecting then you probably already need such Spiral Cellar. It can hold up to 1,900 bottles in perfect storage conditions and since, like a traditional cellar, it relies on the surrounding earth for its insulation, plus an ingenious air-flow system, it requires no power to maintain its constant temperature. The good thing is that you can hide such cellar behind a trapdoor in virtually any room on the ground floor in your house. There are even DIY kits available.