London is one of the largest cities in the world. Its population is a lot smaller than Tokyo or Shanghai, but it is by far the most popular tourist destination. London is probably most famous for its museums, galleries, palaces, and other sights, but it also includes a wider range of peoples, cultures, and religions than many other places. People used to say that it was the dirtiest city too, but it is now much cleaner than it was. To the surprise of many people, it now has some of the best restaurants in Europe too. For some people, this makes London the most exciting city in Europe.