Letian shopping mall
Nandamen Market and Dongdaemun Market are the largest comprehensive trade markets.
Seoul Tower and Building 63 are famous landmarks in Seoul.
These places are not bad and not far away.
Mingdong is expensive but good, and there are many handsome guys and beautiful women. I haven't been to many of these places, but one thing is that they are not far from the city center by car. It takes a lot of effort, so it's better to choose a cheaper place. You will know when you go to Korea. In fact, Seoul is very small, so don't worry about the distance.