You should really go to Namsan tower for the view of the city it’s best at night, see the cherry blossoms in the right season, hang around Han river and eat chicken there, have fun at the pc bangs and the big malls anyway there is anything you want there ! And the food is amazing !! Try as much as you can to eat local food, you won’t be disappointed!
I’m from korea- if you are foodie, love some trendy clothings- you will love Korea
Absolutely amazing for any ages, travelling around is dirt cheap and everyone is friendly
Very cheap eats and everyone is very patient with you if you don't speak Korean! Very safe area, many neighborhood filled with people even late at night so it never is dangerous. People tend to leave you alone and mind their own business but will always be ready to help! The subway is the best way to get around Seoul as it goes everywhere, even outside the city and it is very cheap so utilize KakaoMetro in the play store because it helps you navigate the metro very easily !! The picture below is of the bridge near Dongdaemun Market !!