|From Dong-A’s Prime Korean-English Dictionary|
Apparently, according to the eastern sand, the best place for burial is a place that looks like a woman’s vagina, as the following map shows:
|From “The Chinese Odyssey”|
The Chinese character that was used to represent a woman’s vagina is Also (야). The Chinese character for “a place where water gathers” or “a pond” is Pool (지), indicating that the vagina resembles a puddle. Personal 氵is an alternate form of water (수) means “water”.
You can read more about 명당 in English here.