Daf showed me his China pics today. Something massively impressive about the photos of the wall, and the scale of the Summer Palace, the Forbidden City and Tiananmen square. Somehow having someone you know stand in the picture puts it into a frame of reference you can really understand.
I think Douglas Adams summed it up when he described space:
Space is big. You just won’t believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.