PDX Sliders in Portland were voted the 4th best burger joint in America by YELP, and it's easy to understand why. All under $6, you can't go wrong with the Steel (which is a freakin' steal). A whopping double cheeseburger with American cheese, bacon, caramelized onions, and aioli on brioche, you'll think you died and went to burger heaven. This slider is so huge, it can barely get away with the term slider.