I think I might have already mentioned the mediaeval city of Siena in Italy and its wonderful shell-shaped 'campo' in previous postings. Well, if you like sketching people, there are very few places as good as this for the job. The curve of the ground - which I believe is artificial, thus actually built this way - allows for people to lie and rest in the sun, and while they are just chillin', I can sketch them. It's brilliant.
Yes, some notice and comment. Most people don't mind. I make a point of explaining myself to parents though - wouldn't want them to worry.
Unfortunately the original drawing has been lost - as in I don't know what happened to it after I sent it to the US.