The Sixth Floor Museum at the Texas Book Depository is the scene of the assassination of JKF about 54 years ago. The museum is not only about the assassination and the aftermath, but about half of it is about the 1960s culture and politics. It reminded me of some of the presidential libraries I've visited. I really enjoyed learning more about all of that since I was born in 1964, about 6 months after the assassination. There's never really been a presidency like the Kennedy one since then, a wildly popular, young family that many Americans idolized. The museum was good and you get a headset to guide you through the displays.
There's a few other things downtown that are worth a second look:
Just across the street is a beautiful red courthouse, over 100 years old, that is now a museum. On our way to dinner (we walked) we also passed the John Bryan cabin, a monument to JFK, and also a strange giant eyeball!!!
The story on the eyeball is that the owner of the lot wanted to build a parking garage but downtown wouldn't let him, they said it "would be an eyesore." He asked if he could put a sculpture on the grounds and they agreed. So, now there's an EYEBALL, instead of the EYESORE. :)
Just kind of goes to show you that you shouldn't overlook places you think you know...