You seem to have embarked on a world-wide tour of Apple retail stores... What keeps bringing you in?

The store is almost always in a high traffic neighborhood you're likely to visit. If walking by, why not walk in? They're usually interesting from an architectural design perspective, at least compared to the Hollister store next door.

Not OP, but I generally stop into one if I pass a new one, especially while traveling. It’s a great place to get free high speed wifi for example.

Maybe power adapters? France, UK and the US have different sockets.