u/Evening-Way1624

What are places that I should absolutely visit while in Seoul and also places outside of Seoul?

I am currently visiting Busan and Jeju but am not sure what other places I should look into visiting.

any information and input will be appreciated!

My friends and I are travelling to Jeju during our trip to South korea for about a day and a half. We want to explore the naturistic side and also the city life.

What are some must-visit places that we should look at?

And any tips while we are over there? for example, is it safe to go out and explore at night?