Every family in every town on every continent has one.
It's a cabinet. Not particularly odd or out of place. The paint was peeling on the corners, and the knob was a bit loose. The inside smelled like dust and the paint wasn't the same as the kitchen walls.
You hid in there once during a game of hide 'n' seek.
No one told you it doesn't open back into your reality. Don't worry, you can't tell the difference.
But everybody misses you.