My answer is..
I recommend to foreigners to eat Korea food like bibimbab, bulgogi.
It is very valuable memory to foreigners.
Sometimes, some foreigners dislike Korea food's smell like kimchi, soybean paste.
But, these are very good for our health.
Second, i also recommend to foreigners to visit Insa-dong.
Insa-dong is a very traditional space.
Specially, there has so many signboard made from Hangul.
Hangul is a very beautiful language.