The biggest car in the world is the Hummer.
The RWE Bagger 288 excavator is the world's largest land vehicle and is currently moving mountains--or at least one mountain--in Germany where it's in use excavating an open pit coal mine for a utility. But there are plans for its cousins elsewhere--digging for gold in Romania, for example.
The Bagger 288 (Excavator 288), built by the German company Krupp for the energy and mining firm Rheinbraun, is a bucket-wheel excavator.
More specifically, it is a mobile strip mining machine. When its construction was completed in 1978, Bagger 288 superseded NASA's Crawler-Transporter, used to carry the Space Shuttle and Apollo missions, as the largest tracked vehicle in the world at 13,500 tons. It is the heaviest land vehicle. However, Bagger is powered from an external source and is more correctly described as a mining machine which can be moved, while the crawler-transporter was built as a self-powered, load-carrying vehicle.
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