Seoul Suburb Mega Mall: Starfield Hanam + Traders Half-Day
Hanam
If downtown Seoul shopping is Daiso and Olive Young, the suburbs are a different scale. Starfield Hanam has the Instagrammable Starfield Library + Electro Mart + No Brand, and you'll need more than half a day. Then walk to Traders next door for warehouse-priced ramen, seaweed, and snack boxes. Come on your last day with empty suitcases.

