A visiting to my fren's house...

A well that built inside the house, to restore some water from rain.But definitely not for drinking anymore, they pull a hole on it so the water wouldn't go up level.
As you can see they feed some "Fu Kui" fish in the well.
This is where the water came from, up above the roof there was a hole, and the rain keep coming in when it was raining. For your information this house was built on years 1963.