Sol's death scene
One of the most moving scenes ever filmed, especially when the viewer knows that Robinson knew how close he was to dying and that it was his last scene ever. When seen from his character's perspective (a beautiful world, forever gone) it has brought me near tears more than once. Heston didn't know his old friend "Eddie" was terminally ill as they filmed it, yet its impact made him cry as well.
They worked beautifully together in this film and their improvised dinner scene is also wonderful to watch.