This king rules one whopper of a fast-food empire. Burger King Worldwide operates the world's #3 hamburger chain by sales (behind McDonald's and Wendy's) with almost 13,000 restaurants in the US and more than 100 other countries. In addition to its popular Whopper sandwich, the chain offers a selection of burgers, chicken sandwiches, salads, and breakfast items, along with beverages, desserts, and sides. Many of the eateries are stand-alone locations offering dine-in seating and drive-through services; the chain also includes units in high-traffic locations such as airports and shopping malls. Burger King Worldwide is owned and operated by Restaurant Brands International.