Daily 10 a.m. - 6 p.m. when there is an exhibition. Exhibitions are held only two weeks in May and October - check before going.
No admission fee.
Wikipedia https://zh.wikipedia.org/wiki/澗松美術館
电话 +82 2 762 0442
地址 97-1 Seongbuk-dong, Seongbuk-gu, Seoul, South Korea
坐标 37°35'36.971" N 126°59'48.444" E