[SPOILER] This is the house where Mok Jin-woo (Kim Min-sang) lived as a child in Hwayang, with his prostitute mother in Tunnel (터널) (OCN, 2017). In episode 15, he kidnaps Shin Jae-yi (Lee Yoo-young) and brings her here to interrogate her and find out where the fountain pen is. Later, Park Kwang-ho (Choi Jin-hyuk), Kim Sun-jae (Yoon Hyun-min) and the rest of the detective team come here, with the two chasing Jin-woo down.
Mok Jin-woo’s House is a located in Dongducheon’s neighborhood Saengyeon [Saengyeon-dong/생연동], Gyeonggi-do. The house is tucked in one of the small streets, at number 11-2.
Observation: After Kwang-ho and Sun-jae run out of the house in episode 15 of Tunnel, they are seen running down the street in front of house 20-12. However, they dash out into Pyeonghwa-ro (평화로), which is actually on the opposite side of the neighborhood from where they’re supposed to be. It’s nearer for them to get to Pyeonghwa-ro from the house itself (on 11-2).
11-2 Pyeonghwa-ro 2457beon-gil, Saengyeon 1(il)-dong, Dongducheon, Gyeonggi-do, South Korea
경기도 동두천시 평화로2457번길 11-2
Pyeonghwa-ro 2457beon-gil, Saengyeon 1(il)-dong, Dongducheon, Gyeonggi-do
경기도 동두천시 평화로2457번길
Dongducheon Jungang Station [동두천중앙역], Seoul Subway Line 1 and Gyeongwon Line, Exit 3
— submitted by Mich KDL