"This area's boulders are scattered following Yong-dong Valley, left of Hwa-Myeong Filtration Plant(화명 정수장), Buk-gu, Busan.
I devided 2 sector. Sector 1 is riverbed boulders and sector 2 is rockslides upper part of the valley.
You can scope and establish lots of boulders. This area is still untouched."