Krua Dan Tai
This roadside shack has a sign in Thai that says "Southern food is supposed to be spicy"---so you can be assured that there is no toning the spice down here. There are also tamer Thai dishes for the faint of heart, but this is where to try authentically fiery po taek (clear seafood soup), a turmeric-and-chili-heavy dry curry called kua kling, and the homemade chili dips.