Originally Posted by mikesaidyes

And yes, stick to Jongno and Myeongdong. They're right around the corner from Seoul Station. Myeongdong for a ton of shopping, Jongno for Insadong touristy stuff, Gyeongbokgung palace and Samcheong-dong/Bukchon Village. It can all be done in 2 hours.

I'd suggest go to Myeongdong first. You can connect right to Line 4 from AREX and it's just two subway stops. Then, from Myeongdong, walk up to Insadong, see the Cheonggyechon Stream, grab a coffee somewhere, and stroll through Insadong. At the end of Insadong, you can hop over to Gyeongbokgung Palace and Samcheong-dong, time depending. When you're finished, you can grab a taxi to Seoul Station or subway again just one or two stops to there.