Why Grave Yards in Mountain in Korea ?

Usually Grave Yard is located in mountain in Korea.
Cemeteries and tombs seemed to be located on the flat area in other countries.
But in Korea to make tomb in the moutain was a kinds of essential duty of descendants. I don't know the reason why, but I could estimate the cause.
Koreans have thought that the place of ancestor's tomb could effect the fate of the descendants. More over koreans have believed that there existed good and bade energy in the mountain. So descendants had been trying best place for tomb of their parents. Even there was story the presidential candidates moved their parents tomb for better place. It is a kinds of superstition. But it have affected to people very strongly.

Here I 'd like show you some grave yard where is located in the mountain.

I took the photos near my office

These photos from Chuncheon

The photos of below are near my house

Why mountain? We korean have taken it into granted to make tombs in the mountain. May be nobody have tried to find out the reason.
In my opinion this custom was deeply related to korean traditional religion.
In korean traditional religion, the mountain god has the second important god. The first is the Heaven God, the second god is the Mountain God, the third is the Ancestral god, and so on.
The mountain had been supposed as sacred place for early koreans even until now. I had posted several time there was a shrine for the mountain god in Buddhist Temple. The mountain god was always followed by Tiger.

Thank you for reading