For real junk food go to some of the big chain restaurants in America, they make MacDonalds look (and taste) like Gourmet Dining. The worst meals I have eaten in the us has been at Places like Pizza Hut, East Side Marios and worst of all, by Far , Olive Garden. I have no idea why anyone would eat there.The Alfredo was foul, fake white sauce, overcooked pasta and soggy bread, not to mention about five times the calories of a big mac.
   I find that the best food is often in small local places or in Street trucks where the food is freshly prepared.