Answer:
What kind of room has no windows or doors?
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
A harvest sown and reaped on the same day in an unplowed field. Which increases without growing, remains whole though it is eaten within and without. Is useless and yet the staple of nations.
What lies in a tunnel of darkness. That can only attack when pulled back?
As I walked along the path I saw something with four fingers and one thumb, but it was not flesh, fish, bone or fowl.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.