No one would know that the Wicker House is any different from those on the same street. On the outside, it is the same as any other. Unless you happen to have a very particular eye.
For if you go to the backyard that has no fence, you would not know that there is a door. In fact, there is no way to even distinguish a door unless the stars are out. And even then, unless you knew what to look for, all you would see is a perfectly solid and impermeable stucco wall of a seemingly normal house.
However, whenever you walk past the house in the evening, you may just feel a cold breeze brush the back of your neck. Or if it is a new moon, you may hear a tortured scream coming from the complete darkness of the backyard.
If you choose to investigate the sound because of the tugging in the pit of your stomach, you will find that the backyard is empty. That there is no one there who could have uttered such a horrible noise.
And yet… you are sure the scream came from the ground you happen to be standing on as it continues resounding in your ears.