[He looks to where she points, studying the area around it. So many towns crammed into one place... His eyes drop to the key, and he should really stop being surprised at this point but his eyebrows jump up a bit anyway.]

There are really cities with more than a million people living there? [But it makes sense, with greater access to resources.] The place I'm from was one of the biggest cities in the walls, but we had nowhere near that many people.