Paris, the most beautiful city in the world.
We tend to think of beauty as being mostly subjective. But if you were to ask a random sampling of 100 people what the most beautiful cities in the world are, you'd probably get a lot of very similar answers. A lot of people might name San Francisco, or Paris, or Prague. But you probably wouldn't garner a lot of votes for Frankfurt, Germany, or Houston, Texas. What makes certain cities more beautiful than others? And why is it that newer cities often tend to be the ugliest of all?