This is where Kim Hye-Won (Jang Hee-Jin) goes for a work appointment in episode 4 in On the Way to the Airport (공항 가는 길) (KBS2, 2016).
The Korean Stone Art Museum [우리옛돌박물관] is located in Seoul’s neighborhood Seongbuk-dong [성북동], Seongbuk-gu [성북구].
서울 성북구 대사관로13길 66
330-1 Seongbuk-dong, Seongbuk-gu, Seoul
Geolocation: 37.6011845, 126.9899196
Hansung University Station [한성대입구역], Seoul Subway Line 4, Exit 5 or 6.
(Best to take a bus or taxi from here)
— submitted by Marion KDL