Enjoy the Han River with some Korean fried chicken or ramen
Stop by Seoul Forest Park to enjoy a scenic walk (cherry blossoms may be in season in April)
Great place for shopping & you can take a nice walk by the Seokchon Lake in front of the mall
Stop by cute cafes and experience the traditional Korean architecture at Bukchon Hanok Village. Gyeongbokgung Palace is also nearby if you want to dress up in Hanbok and tour the palace
If you feel young and trendy, check out the bustling streets of Hongdae