World's largest building costing £740m to build is so big it has its own weather

World's largest building costing £740m to build is so big it has its own weather

The colossal facility cost more than £740m to build and has produced over 5,000 wide-body aircraft since it opened in 1967

World's largest building cost $1 billion and is so big it has its own weather

The Boeing Everett Factory in Washington is the world's largest building by volume and offers tours that last 80 minutes.