Sunday, 17th April 2005 by
The Boeing factory building is the biggest building (by volume) in the world. The original building was constructed in 1966 and completed in 1969. Its footprint now covers 98.3 acres and is where Boeing constructs their 747, 767, and 777 planes.
Thanks Andrew, JReykdal, Brian, Siavash Shiva, Shawn C, Ed Hirsch, Nathaniel, Chris & Ballard.