This is where parts of Urk, the imaginary country in Descendants of the Sun/Descended From the Sun (태양의 후예) (KBS2, 2016), were filmed. In Urk, the military base as well as Haesung Hospital’s medicubes were stationed here.
But this place also served as filming site for the military training site in South Korea where Seo Dae-young (Jin Goo) trains recruits in episode 6 and when Yoo Si-jin (Song Joong-ki) comes to visit him with a quite spectacular entry.
The Descendants of the Sun Taebaek Set [태양의후예 태백세트장] was formerly known as Taebaek Hanbo Exhausted Mine [한보탄광]. Actually, the filming set for Descendants of the Sun, namely the military base, was set up in an exhausted mine from Taebaeck Hanbo. The set was destroyed right after the filming was finished but the place is open to visit and one can see for example the military training site (which existed prior to the set because those are ruins of the mine’s buildings).
This place lies east of Taeback city which is around four hours by public transport from Seoul.
Adress: 강원도 태백시 통동 산67-1
Geolocation: 37.154824, 129.040352
To get here: Dongbaeksan Station [동백산역]