Hi! I am going for an extended visit to my sister who is working as a teacher in South Korea. She is based in Busan and has not yet travelled much at all outside of the city. I am looking for recommendations on what I should see and do while I'm in the country - I will be based with her in Busan but I am keen to travel further afield for some weekends etc. I am going in October so some advice on the weather and what to pack would also be useful.