Spanning an astonishing 472 million cubic feet, the Boeing Factory in Everett, Washington, holds the title of the world’s largest building by volume. To put it in perspective, it’s so massive that all of Disneyland could fit inside!

Covering 100 acres, this engineering marvel doesn’t just assemble airplanes—it’s practically a city under one roof. The facility accommodates four different airplane types and includes:

A museum showcasing aviation history
A theater for presentations and events
19 restaurants to feed the workforce and visitors
A store for Boeing merchandise
2.33 miles of underground tunnels
Its very own railway spur
From its colossal hangars to its intricate infrastructure, the Boeing Factory is a world of its own—a place where engineering, innovation, and sheer scale come together like nowhere else on Earth.