There's plenty to do surrounding Seattle, on day trips and overnighters, starting with taking ferries across Puget Sound out to the idyllic islands like Bainbridge and peninsula shore towns such as Port Orchard. Aviation sites also loom large around here. This area is of course the headquarters of Boeing, and a half hour north of the city in the town of Mukiteo the company operates the Future of Flight Aviation Center & Boeing Tour, including interactive exhibits, a flight simulator, a design simulator, and 90-minute tours of the jet manufacturing plant right next door. Meanwhile, 20 minutes by car and 40 by bus south of downtown, another aviation geek playground is the Museum of Flight, right alongside the county airport. The world’s largest air and space museum, it includes more than 150 aircraft both civilian and military.
Read more in my post Seattle Is an Exciting Evergreen.