Having only opened two years ago, this little burger joint in Daechi-dong has quickly gained a cult-like following. Their burgers are meaty, cooked to the ideal medium and are expertly seasoned. There are some unique burgers here, like the M.A.C. (mac ‘n’ cheese, cayenne pepper), as well as classic combos, like the Chili King (chili, cheese). Our personal favorite here is the Habana (jalapenos, mayo, cheese). It’s a simple, juicy burger with superb spicy mayo. The bun holds up well, and the toppings don't splat onto your plate right away. Their fries are light and crispy, and though the regular fries are good, we think the wedge fries are the winner. Cheese, chili and cheese, ranch sauce and bacon can be added for an additional charge. Best of all, Firebell makes great shakes. The flavors are uncomplicated, delicious, thick and creamy—the way shakes should be. All in all, this spot is well worth the trip for arguably Seoul's best burger.