Seoul has rougly two million more people than New York, but is 75 square miles smaller. It's population density is a whopping 43,294 people per square mile.

What is Seoul famous for? Seoul is the capital of South Korea and is known for its famous temples and four major palaces with Gyeongbokgung being the most important one. Seoul is also famous for its cultural and artistic attractions, traditional porcelain, textile, and jewelry.

At 16th place, Seoul is now one of the most expensive cities, considering that cities ranked higher on the list, such as Hongkong, Singapore, New York, and Copenhagen, have always been notorious for high living costs.