Size DO MATTERS :)

This is the largest digging machine (or trencher or rotating shovel) in the world. It was built by Krupp and is shown here crossing a road in Germany on the way to its destination, an open air coal mine.
Although at the mine the treads are unnecessary, it was cheaper to make the machine self-propelled than to try and move it with conventional hauling equipment. Some factoids:
The machine is 95 meters high and 215 meters long (almost 2.5 football fields in length)
Weight is 45,500 tons (that's equivalent to a bumper to bumper line of jeeps 80 miles long)
It took 5 years to design and manufacture at a cost of $100 million
Maximum digging speed is 10 meters per minute
Can move more than 76,000 cubic meters of coal, rock, and earth per day.

The Antonov An-225 Mriya is a strategic airlift cargo aircraft that was designed by the Soviet Union's Antonov Design Bureau in the 1980s. The An-225's name, Mriya means “Dream” in Ukrainian. It is powered by six turbofan engines and is the longest and heaviest airplane ever built with a maximum takeoff weight of 640 tonnes. It also has the largest wingspan of any aircraft in operational service. A second airframe was partially built; its completion was halted because of lack of funding and interest.
The Antonov An-225, originally developed specifically to transport the Buran spaceplane , was an enlargement of the successful Antonov An-124 . The airlifter holds the absolute world records for an airlifted single item payload of 189,980 kilograms (418,834 pounds), and an airlifted total payload of 253,820 kilograms (559,577 pounds). It has also transported a payload of 247,000 kilograms (545,000 pounds) on a commercial flight.