The largest warehouse in the world, measured by total floor area, is the Boeing Everett Factory in Everett, Washington, USA. The factory covers a total of 472,370,319 square feet (43.9 hectares or 109 acres).
The Boeing Everett Factory is primarily used for the manufacture and assembly of wide-body aircraft such as the Boeing 747, 767, 777, and 787.
It has its own internal transportation system to move aircraft parts around the factory, and it even has its own fire department. The factory is an impressive engineering feat, and it is open for public tours, offering visitors a chance to see how airplanes are made.