Since the 18th century, factories have been a mainstay of industrial societies, mass-producing goods and providing jobs for millions of people. As the products they manufacture have evolved in scale and technicality, the workplaces that facilitate production have also developed into the sophisticated operations we know today.

Making everything from aeroplanes to underwear, read on to discover the staggering size of some of the biggest factories in the world right now. All dollar values in US dollars.