The McDonald's dessert station opens at 9 am. McDonald's is the largest fast food chain in the world. It is a fast food chain restaurant, which was founded by McDonald's Brothers and RayKroc in the United States in 1950s, and mainly sells hamburgers. Around the world, McDonald's restaurants are spread all over six continents 100 countries. McDonald's has become the most valuable brand in the global catering industry. In many countries, McDonald's represents an American lifestyle.