Chilean "completos" are hot dogs piled high with the works--usually mashed avocado, chopped tomato, optional sauerkraut, and an obscene amount of mayo (maybe 1/3 cup). Actually, eating them is a feat of gravity without the toppings winding up on your shirt, or the ground. Chileans are passionate about their completos and no place draws them in like Dominó, an old-school soda fountain with locales peppering the downtown. Locals crowd around the counter to scarf down these dogs with Coca-Cola or freshly made juice.
Various locales throughout downtown (see website)