It's a secret place to hide in case the place is surrounded by hostile Indians. You know, Indians, a bunch of guys who will crash through your door waving tomahawks and then one of them sez, he sez, "'Allo. We are 'ere from Microsoft technical support. You may call me 'Bob'." But you know "Bob" isn't his real name.
Or it's for sponges. But I think it's to hide from outsourced technical support. Wish I had one.