Besides coming from Street View, you can also get to user photos using the Photo Layer in Google Maps (under the 'More' button). For instance, following this this link you can get to a cool view of the plaza from a tower, and then you can easily browse to other photographs also taken from the tower. You should try it out for yourself to really get the feel for this seamless new navigation experience, but here's a short video that will also give you a walk-through of this feature: