Obscured Realities

Once upon a time, there was a door
Everyone forgot where it goes.
Is it the kingdom of marshmallow trees?
Or maybe a place where stars wear shoes?
Knock three times, and find out what hides beyond.

A whisper told me:
"Beyond the door, the skies sing."

Will you step through?
Or will the shadows play with your dreams tonight?
Maybe visit the Rainbow Bridge?
Or follow the Curious Cats?