Van Buren St Post office is the largest one in Phoenix, which probably puts it on the list for largest in America. But unlike some other post offices, it's clean, functional, and there's a friendly greeter at the entrance who will help you send your letter or package. Well, I just think that's swell. This is the type of post office where the post master works and you can get a passport. It has all the different priority mail boxes available. Even the rare "mailing tubes." In short the best post office ever.I have to give Yelp a shout out here, i was gonna go to a different area location, saw the terrible reviews and sorted my life out. Thanks Yelp.