Lion King has several moments that bring me to tears...the Mufasa death scene has always been the worst, but Circle of Life intro, the "remember" scene with Rafiki w/Mufasa in the heavens, and when Simba ascends Pride Rock all get me.
If it's an in park "gotcha" moment, I have choked up in Peter Pan over London, Wishes gets me in about 5 places, and just this last trip- I actually found myself tearing up as I turned onto MSUSA. I mean- I've always adored that turning the corner and seeing the castle moment, but this is the first time I can remember any tears.
Funny you bring this up though, b/c over the past weekend it was Mary Poppins that had me in tears. Specifically the ending- just after the "Let's Go Fly a Kite" scene...when she's having the talk with her umbrella and looks like she's about cry.