Northwest Airlines History Centre, Bloomington

What a fantastic collection of artifacts from NWA. Most of them items that would have otherwise been trashed or forgotten about. The volunteers the day I went were former employees and recounted many stories. I could have stayed another hour talking to them. Definitely recommend a visit if you're looking to kill some time before a flight. Just note the signage isn't that good for finding it. Best way in is to park in the hotel parking lot top level then enter through the glass doors then up the stairs one level which can be found beyond the pool

This place is a bit hidden but is a neat visit. Exhibits on the history of Northwest and the airlines that merged into it. Staffed by retired NWA employees. The collection is impressive, much of it donated by the airline itself or by Delta when they bought it. Some exhibits rotate periodically. Was very impressed. Very close to MSP so doable during a long layover as well.