In the ending of the story "A Very Old Man with Enormous Wings" by Gabriel Garcia Marquez, it says that the angel is an imaginary dot on the horizon...

The nature of the angel
in the story is
ambiguous. By referring to the angel as "an imaginary dot," the author
could
be suggesting that the angel was a figment of the imagination. However, the author
could
also mean that Elisenda keeps watching the angel flapping away until
she can no longer see him,
not even the faintest trace of him, but she
imagines that she does.

The
story is written in the style
of magical. This literary style combines realistic and surreal
elements. The
angel is presented in a kind of matter-of-fact, even mundane way in the course
of
the story. In fact, he has ragged wings that are missing half of their
feathers, and he seems
far from being an angel of
myth....