If you are talking about the mobile app; The photos in any area are divided up by sub areas and routes. In the main area, you can only see photos uploaded to the 'overall' area page. In sub area may also have photos uploaded to only that sub area's page. Each route may also have photos uploaded to only that route's page, which you can only see by first selecting and opening that route. I don't know if there's a way to view all nested photos for any given area (yet?).