LoLa Burger, Nantucket
Wow. Look at that burger. Now look back this sentence. Now look back at that burger.
This place is crazy good. It's right off the bike trail so if you ever find yourself riding and want to completely cancel out your workout with a meal that makes you regret your life completely but you could also die out of happiness, this is the place.
They serve some really trippy signature burgers, but I usually just build my own. Shown above is a Double Stack with bacon, spicy bacon sauce, and all the fixins.