2. The largest city in the world is Hulunbuir – Where would you guess the world’s largest city would be? China, India, Russia? Just so you can make an idea, this city in inner Mongolia (China) is about as half as big as France, and it’s just a city! The urban space is just a small fraction of the city with the area population density being small. All accross the megacity you can see large landscapes of grassland, and industrialization is only existant in the center. For all its surface, the city has “only” 2.5 million inhabitants.