THE SPRUCE GOOSE AIRPLANE
Building 15 was where Hughes oversaw construction of his Spruce Goose airplane. The plane was bigger than anything before (or since, really), and the hangar speaks to that. Custom built for the plane, it has two 750-foot hangars, and reaches seven stories at its peak. That’s all open space, too. The hangar is massive, with an area of 319,000- square-feet.