Uud, the second largest megacity on Earth.
It is known for the large amount of businesses that thrive here because of how close the businesses are to each other. Even in this advanced world where distances hold no real value nor do they serve as a painful hurdle, there still are some things that cannot change. One of these unchangeable things is the phenomenon of how alike things attract each other and form clusters. For instance, you may notice that on very famous tourist points, the large majority of people will be tourists and not people on business trips, while on the other hand, a candy shop may rarely appear in a red light district.