The Commonwealth cemetery at El Alamein was very moving for me... 8000 headstones. We'd been to the Italian (beautiful) and German (compact and very gothic) cemeteries, but the Commonwealth one was huge.
Poverty around the world upsets me too. Manila, Chennai (it was still Madras when I went), Colombo, Vasco Da Gama. Kids follow you everywhere. A few rupees might get them something to eat today, but probably not tomorrow. We argued with a tuktuk driver in Madras over a piddling 50p. And this bloke had took us all over and waited for us while we were in the Sheraton on the lash. Later on I felt really ashamed of myself.
Life's cheap in many parts of the world and sometimes you just don't or won't see it.