The Tesla Gigafactory is will be the largest factory in the world (when fully built) where businessman, visionary and the first man of Tesla Motors, Elon Musk, will produce lithium-ion batteries. The factory is located in Nevada, USA, in the middle of nowhere, and today saw its grand opening, to which Musk invited influential individuals and some buyers of the Tesla Model S. The massive facility is still unfinished (14 percent of the planned, or the first of eight parts, is currently built ), and the plant is expected to breathe with full lungs in 2020, when in terms of usable area it will be the largest building in the world!