The Mysteries of the Horizon (1955) is an oil on canvas painting by the Belgian surrealist René Magritte.
The painting depicts three seemingly identical men in bowler hats. They are in an outdoor setting at twilight. Each one is turned toward a different direction. In the sky above each figure is a separate crescent moon.
Men in bowler hats have appeared frequently in Magritte’s work since his 1926 painting The Musings of a Solitary Walker. They are represented as having undefined or identical personalities.