There are a few static displays of aircraft that look like the SR-71. But maybe they are not SR-71s. How can you tell the difference?
1. If it is a single seater, it is an A-12 (there was one 2-seat trainer but that's gone)
2. If the forward chines are chopped short of the nose, it is a YF-12
3. If it is a two seater and the chines go to the nose it is an SR-71
SR-71 trivia question: What color is the SR-Blackbird?