If you are ever in or near Tucson, AZ, the Pima Air & Space Museum (https://pimaair.org/ https://pimaair.org/) has a full-scale X-15 mock-up as well as one of t

If you are ever in or near Tucson, AZ, the Pima Air & Space Museum (https://pimaair.org/ https://pimaair.org/) has a full-scale X-15 mock-up as well as one of the B-52s used for launching the things. You can coordinate this with a bus tour of the "bone yard" at nearby Davis-Monthan AFB. Note: the bus tour requires advance reservation & security check, I believe.