There's a wild new version of the real world being constructed in "Where the Sidewalk Ends," far far away from any land we've walked to on a sidewalk or even a dirt path through the woods. This reality is an escape from the city that you can make without actually physically leaving the sidewalk. It takes us deep into the land of childhood fantasies, and just because we must use our imaginations to travel to where the sidewalk ends, doesn't make it any less real. Adults and children alike can benefit from a stroll into the alternate reality created in this poem.
The place where the sidewalk ends is a metaphor for the imagination.
This poem views the imagination as a powerful tool to create other realities.