This rock in petroglyphs is located, not in a closed space or in the room, in front of very old, small mound tomb in Dohangri, Haman (Kaya), near Pusan, Korea. I think the archtypes of making these cupmarks and concentric circles is come from praying for the 'Egg', which looks like the womb and the earth, the universe.

Bird's Eye View of Haman Tumuli (about 50 tumuli along the hill.)

This 'Takbon' which means the rubbed copy of petroglyphs with 'Muk' (chinese ink), show the cupmarks and lines, several concentric circles.

(photos taken in Sep. 1997, written in Oct. 1997)