1.) A 418,834 lb. Generator
The Antonov AN-225 is one of the largest things to ever fly, a feat made even more impressive by the fact that it once transported a 418,834 lb. generator, the largest single item ever transported by an aircraft.
Could you imagine sticking something that nearly weighs 420,000 lb. into an airplane? The crazy thing is that the Antonov can carry more. It’s record is a 559,557 pound payload!