What room has no windows, floors, ceilings, or doors?

Riddle: What room has no windows, floors, ceilings, or doors?

ANSWER:  A Mushroom.

At first sight, the riddle may sound ridiculous to you because it is not easy to imagine a room without windows, floors, ceilings or doors. However, there is at least one room without all these features. The riddle tricks you by asking what room can be lacking of all these aspects, but when you think for a while, you can see it is a word that ends or starts with ‘room’. In the English language, there are not so many words that might come to your mind. Therefore, you can easily realize the answer of this riddle, which is a mushroom.