MEGAFACTORIES

They are a must if you are a world leader, but now even mums are starting to use them. Discover how cars are modified for maximum protection.

Take a behind-the-scenes tour and gain insight into BMW's high-tech and innovative manufacturing plants as they create the sleek and stylish Z4 Roadster.

Go behind the scenes at Corvette, where they create the ZO6 supercar. It has a unique, hand-built, powerful engine that can propel it to speeds of 200mph.

The fire truck is taken to the next level of engineering, making it a feat of technological genius. This is the ultimate firefighting vehicle.

The Abrams tank is one of the most powerful land weapons systems in the world. Go inside the two factories responsible for overhauling the 70-tonne Abrams, plus watch the tanks in action in Iraq.

At the Peterbilt factory, workers are busy building Model 387 trucks – titans of the road, made to pull vehicles of up to 36 tonnes. With more than 20,000 parts per vehicle, it's a formidable task.

Go inside the Boeing plant in Mesa, Arizona to witness how the Apache helicopter is built. Discover how it has evolved from the days of the Cold War into a 21st-century digital fighter.

The John Deere factory houses more than 2,000 employees, 49 robotic welders and eight laser cutters, all of which help make the John Deere STS Combine – a harvesting mega-machine.

Inside a top-secret factory in Italy, witness the creation of the newest and most powerful Ferrari yet. Learn the design secrets of this incredible sports car at every point along the production line.

The Harley-Davidson V-Rod can go from 0 to 96km/hour in 3.52 seconds. Visit the Harley-Davidson factory in Kansas City to see the makings of one of the company's most revolutionary bikes to date.

A 400 square-foot movable mansion that can travel at 75mph. Hit the open road in a Winnebago, America's finest home from home.

Step inside the largest and most efficient automated delivery system on the planet. More than a courier, UPS is an epic transport network.

Step inside the largest and most efficient automated delivery system on the planet. More than a courier, UPS is an epic transport network.

With more horsepower than 30 Ferraris, CAT make the biggest mining trucks in the world, with 12ft wheels and engines bigger than a car.