Seeing the photo, you probably immediately decided that it was a window. And why is it here in the fence? Communicate with passers-by, or what?
But they didn’t guess! This garden mirror is window-shaped.
Mirrors in the interior generally have the ability to visually expand the space. So here - a dull dull wall suddenly turned into an additional corner of the garden. The wide-open window invites you to look there, through the looking glass, whose magical world reflects reality in a completely different light.
There is no need to buy new mirrors specifically for this purpose. Those that you consider unsuitable for use in residential premises are also suitable. It is better to install such mirrors in cozy places, under a canopy, for example. There they will be less affected by weather factors.