Boeing’s Everett factory is the world’s largest building by interior volume. It is where the Boeing 747, 767, 777, and 787 airliners are made. The factory is viewed from an observation floor, leaving you a few hundred yards/meters from any aircraft, and the tour can be rather bland and commercial. No cameras or electronics allowed on the tour, not even your cell phone! Tours start from the Future of Flight Aviation Center, which has a gallery and theatre presentations which are fairly interesting, but don’t take very long to view. On the observation deck of the museum, you can watch planes land and take off from the runway, with air traffic control audible on speakers, aircraft are often being tested before delivery to Boeing’s customers. At Paine Field, there are the Boeing tour and these adjacent independent museums. However, if you only have time for one aviation museum on your trip, you might consider skipping this in favor of the ”’Museum of Flight”’ in Renton, which is much larger and engaging than the Boeing tour.