Living in the theory of home geomantic omen, I think that there are temples near my home with bad geomantic omen, and there are shades around them.
In the traditional geomantic theory, Yin Qi near the temple is the heaviest.
Many ghosts will gather here, and the Yin Qi near the temple is very heavy, which belongs to the land of Yin Qi, and the houses around the temple will be affected. If Yin Qi enters the house, it will have a bad influence on the owner of the house.