I saw the SR-71 in a museum and touched it.
The precursor to the SR-71 was the A-12. Yes, I knew about the fuel leakage.
The two that I really wonder about are the TR-3B Black Manta and the Aurora.
Here's a video of the A-12 out of Area-51 (KXTA). https://www.youtube.com/watch?v=psdtKHyefwA