How to choose a hatch invisible to the eye

Any design in the house should have beneficial qualities and beauty. It is sometimes difficult to combine these two things if it comes to, for example, about a pipeline (heating system). After all, the pipe is not for beauty, but for the sake of heat is located along the walls, connecting to the batteries. Nevertheless, most important auxiliary and communication systems can be hidden, made more beautiful, that is, somehow designed so that they do not catch your eye.