A Lake
Examples
Perhaps The truth depends on a walk around a lake.
[W]atching ducks land on a lake in Arkansas in the winter is about the closest to Heaven as you can find on this earth... and as someone who believes, according to my faith, I will go to Heaven when I die, I am pretty sure that there is duck hunting in Heaven!
Nothing is so discreet as a young face, for nothing is less mobile; it has the serenity, the surface smoothness, and the freshness of a lake. There is no character in women's faces before the age of thirty.
Drop by drop would make a lake.
The man is a river, the woman a lake.
Living near a lake doesn't mean you eat fish whenever you need.