The Living Computer Museum is one of the coolest museums I've ever been to. Computers from as far back as the 60's mainframes kept in working order, and freely

The Living Computer Museum is one of the coolest museums I've ever been to. Computers from as far back as the 60's mainframes kept in working order, and freely usable by the public (though you do have to reserve time on the mainframes iirc). The first time I went there I spent hours programming on a paper terminal, which was just beyond cool to a kid who grew up in the 90s. If you're ever in the Seattle area, definitely don't miss this place.