Ultimate Factories, also known as Megafactories in non-US markets, is an American documentary television series that premiered in 2006 on the National Geographic Channel. The program explored the inner workings of factories worldwide. Each episode profiles the machinery and manpower behind each factory's main product, featuring close-ups, breakdowns, interviews, and side stories to show the sequence of events to produce the product in the factory.

The Caterpillar 797 is a series of off-highway, ultra class, two-axle, mechanical powertrain haul trucks developed and manufactured in the United States by Caterpillar Inc. specifically for high-production mining and heavy construction applications worldwide. In production since 1998, the 797 series represents Caterpillar’s largest, highest capacity haul trucks. The current, third-generation model, the 797F, offers one of the largest haul truck payload capacities in the world, up to 400 short tons (363 t) and has the highest payload capacity among mechanical drive haul trucks.