If you want to take an Uber to the Bay State Cruise Company ferry from Boston to Provincetown, don’t tell the Uber driver to go to 200 Seaport Boulevard. That’s a very large building, and you’ll end up blocks (as well as some vertical feet) away from where you want to be. Where you really want to be is at the corner of Seaport Blvd. and B Street. If I invent a location called “165 Northern Ave.,” that seems to be where you want to be.