With a volume of 13 million cubic meters, Boeing's Everett Factory is by far the biggest building in the world. That would be enough to fit 13 Wembley Stadiums.
The Everett Factory is where Boeing produces its jumbo jet 747s as well as some of their smaller models, the 767, 777, and 787. But what is it like to work in this massive factory day in, day out? Stephen Dowling writes about it on the BBC:
Each shift has as many as 10,000 workers, and there are three shifts each day. Over the course of 24 hours, the factory has a population only a little less than the Australian city of Alice Springs.
The factory boasts some surprising features. While there is ventilation, there is no air conditioning. In summer, if it gets too hot, David Reese, who helps run the factory tours, says, they just open the massive doors to let in the breeze.
In winter, the effect of the more than one million lights, the huge amount of electric equipment and some 10,000 human bodies also helps moderate the temperatures.
(Image credit: Wikimedia Commons)