Katakomb 11 Wausan-ro 17-gil, Mapo-gu, Seoul (서울 마포구 와우산로17길 11) This is by far one of the easiest places to locate. I haven't been to any part of Seoul yet but at first look, I knew immediately that that scene where Lee Geon ( Jang Hyuk ) and Daniel Pitt ( Choi Jinhyuk ) had a subtle drinking competition was filmed here. I have ID-ed Katakomb Underground City for quite a few times already so it's not difficult. This Hongdae bar indeed has a unique appearance which definitely amuses me to no end. I love how lights adorn almost majority of the bar's walls. Even the arcs were illuminated. However, no matter how Christmas-y the bar seems to me, the mysteriousness of the place was still highlighted because it does look like an underground hideout of some medieval organization. It has this dungeon-feel which is kinda supported by the presence of skulls. (Check the curtains of it on the walls!) The leather seats were nice too. ^^ For more pict...