I am going to Menorca next week, staying in Cala en Porter. I would like to go for lunch and a stroll in Mahon. I won't have my own transport but can get a taxi or bus. However I can't walk very far and I remember from visiting ages ago that it's quite hilly. Can anyone recommend an area good for people-watching and lunch, preferably with a harbour view which isn't too taxing to walk around? Not asking for much I know!