This market, one of the biggest ones in the city, has a long tradition since its existence dates back to the 15th century. It is a great place for all the shopaholics for there is pretty much nothing you could not buy there.
Apart from various products (clothes, fabrics, souvenirs, toys etc.), you can also get the traditional Korean food there in one of the many takeaways that line up the streets. There is always an enormous variety of Korean snacks from which you can choose and enjoy the food as you walk through the lively market streets.
The place is rather busy so be prepared for crowds of people moving all around you.
Opening hours vary, depending on shopping centers and stores.
Wikipedia https://en.wikipedia.org/wiki/Namdaemun_Market
Official Website http://www.namdaemunmarket.co.kr/index.php
Phone +82 2 753 2805
Address 21 Namdaemunsijang 4-gil Jung-gu Seoul South Korea
Coordinates 37°33'34.113" N 126°58'38.194" E