While you're in Hongdae, be sure to stop by Cafe Yeonnam-dong 223-14. With such a boring name you wouldn't expect much, but you would be very, very wrong. The complete opposite of the other vivid, brightly colored spots on this list, this black and white cafe feels as if you've stepped into a completely 2-dimensional world. Every chair, table, and wall look like a page of a coloring book. Even the coffee mugs are part of the illusion. #lunch #coffee #2D #cafe #seoul