Gwangjang Market, is one of the oldest traditional market located in Seoul. So if you are looking to experience some cultural experience, you may want to add this in your list.

In Gwangjang Market, you can find stuff like textiles, silk, linens, bed sheets, hanbok (traditional Korean dress), second-hand clothes. Not only that, there are also vendors selling traditional Korean bites and also souvenirs for you to bring back at a cheaper rate. Continuing the journey you will be able to come into a cross junction where by there are lots of food vendors to fill your tummy.

Live Octopus > Cold Buckwheat Noodle > Hotpot Bibimbap
The food are cooked on the stop in front of you, the place i would say is clean for a market if you would compare. I am not a fan of bibimbap cause the smell of the veggies is legit overwhelming, but i decided to give this a try cause it looks so good. & guess what it taste good too, you can't really smell the greenest of the veggie cause of the sauce they use to mix it with the bibimbap. I would say this is the best i have ever eaten.
(PS: for those of you who are wondering how a Live Octopus taste like, it's chewy and be ready to show off your chopstick skills)