The Air and Space Museum. Seeing all the different air and spacecrafts throughout history coming to life as well as the mannequins associated with those aircraft, although we didn't get to see any of them take off. Even the mannequins were disappointed.
Mission Control mannequin: Damn, that was disappointing.
Larry and Amelia flying across Washington, D.C. in the Wrights' plane.
Larry gets his where he beats a sword-wielding Pharaoh with nothing but a flashlight. For added epic, if you pay attention you'll notice Larry's arm literally shaking from the effort of fending off Kahmunrah's Egyptian-sword. He's up against somebody obviously much stronger than him, and he still kicks Kahmunrah's ass. And, to reiterate, with a flashlight.
Custer: We are NOT going to attack... right... now! (they attack)