Mill City Museum
As Detroit was built by cars, Minneapolis was built by... flour? Yep. Minneapolis was a major grain exporting hub, and you’ll learn alllll about it at this museum built in the ruins of the old Washburn "A" Mill -- once the largest flour mill IN THE WORLD. The highlight of the visit is an eight-story, freight-elevator ride where visitors are taken through recreations of a working flour mill as "early" Minnesotans tell stories of life in the factory over audio. The last stop is the ninth floor and a panoramic view of downtown and St. Anthony’s Falls, the force that once powered America’s milling industry. During the summer, the ruins also play host to a concert series.
Museum of History & Industry (MOHAI)
If you look around South Lake Union in Seattle and wonder where all the vanishing relics of the city have gone, look no further than this old seaplane hangar on the water. It houses Seattle’s Museum of History & Industry and, in addition to interactive displays that explore the founding and history of Seattle, is dotted with nostalgic landmarks like seats from the Kingdome, the giant pink “Toe” truck, and the original R from the Rainier Beer Brewery.