Seoul - inside tips? What to visit and what to avoid?

Hello! :)

I plan to go on a business trip to South Korea probably at the end of this year and wonder whether someone can give me advice of what to visit, and perhaps what to avoid while staying in Seoul?

I really love Korean culture and would preciate any help and advice given. Thanks!

Neubau

PS: I live in Vienna, Austria but am originally from Croatia. If anyone need a instruction in Croatian please let me know. :)

Hello.bisness good south korea