This is not a real prison but a prison set.
Choi Gang-Soo (Go Gyung-Pyo) is put into jail here in episode 7 of Strongest Deliveryman (최강 배달꾼) (KBS2, 2017) – and released the same episode.
In Mystery Queen (2017), we see locked-up Jang Do-Jang (Yang Ik Joon) here in episode 6 and 7.
We meet Mo Hwi-Chul (Oh Ji-Ho) in Oh My Geum Bi (2016) here for the first time: a prisoner. That’s also where Yoo Geum-Bi (Heo Jung-Eun) meets her father the very first time: when he gets out of this prison in episode 1. In The K2 (2016) this is where Ko An-Na (Yoona)’s uncle brings her to see a witness of her mother’s death in episode 12. And in W Two Worlds (2016), Oh Yeon-Joo is incarcerated here in episode 4. The same goes for Jang Jae-Beom (Yang Ik-June), the brother of Jang Jae-Yeol (Jo In-sung) in It’s OK, It’s Love (2014).
In a flashback in episode 1 of Hello Monster/Remember You (너를 기억해) (KBS2, 2015), we see Lee Hyun’s (Seo In-Guk) dad visiting a prisoner here (a cameo by EXO’s D.O.).
This prison set lies in the city of Iksan, around 3 hours south of Seoul.
Adress: 11 Wacho-gil, Seongdang-myeon, Iksan, Jeollabuk-do, South Korea
전북 익산시 성당면 와초길 11
(성당면 와초리 154-4)
Geolocation: 36.069301, 126.931627