Summary: Beyond the TARDIS door is a world of wonder.
From the outside it’s nothing more than a small, blue wooden box with a light on the roof and a deceptively simple Yale lock. In most places it would appear incongruous, being a replica of something found only on one backward planet, and then only for a relatively short period of time. Even on earth, police phone boxes have long since gone out of fashion, rendered obsolete by progress.
But open the blue-painted door and everything beyond it is out of this world, literally, the interior dipping into other dimensions.
It’s even better than stepping through the wardrobe into Narnia!