I find that when I spend time in cities, I do a LOT of walking. I have blisters on my feet to prove it this week. And I nearly turned my ankle twice two days ago. I remember thinking I had broken a bone in my foot after one long trek in Rome last June. And in Melbourne in 1998, I really did my ankle in after a misstep getting off a tram. But I guess it's a healthier way to get around.