There is nothing on Earth or in the air quite like the Antonov An-225. Dwarfing a Boeing 747, designed to carry twice as much as a Boeing 747 freighter.

The dimensions of the An-225 are staggering—nearly a football field from nose to tail and wingtip to wingtip. With a maximum takeoff weight of about 1.32 million pounds, it is 50 percent heavier than a fully loaded C-5A

http://www.popularmechanics.com/technology/aviation/news/1280771