Ten total presidential aircraft and four you can walk through at the Dayton USAF museum [1]! You can walk through SAM 26000, the VC-137C used by 8 presidents including Kennedy. Amazing collection.
They also have a rather large space museum. Unfortunately a lot it is filled with old rockets though.
I remember two yeah I took a 360 cam through them and some day I might chop it up and run it through some photogrammetry to try to make a model of the insides.