Krystal is a fast-food restaurant chain known for its small, square hamburgers, often referred to as "sliders." Founded in 1932 in Chattanooga, Tennessee, Krystal has become popular in the Southeastern United States, offering a menu that includes breakfast items, chicken sandwiches, and fries. The restaurant's signature sliders are typically served with onions, pickles, and mustard, making them a unique alternative to traditional burgers. Over the years, Krystal has expanded its locations and menu, catering to a variety of tastes while maintaining its focus on quick, affordable meals.