Caer O’Wisp

As you’re walking along the sidewalk enjoying the weather, you notice something standing out in the near by meadow. The closer you get you start to realize the object is a door. A wooden door, with no walls. You circle the door investigating it. It appears to be your normal door except it’s not attached to anything. You are tempted to open the door. You contemplate knocking; but then the door begins to open. Somebody pops out the doorway and bumps right into you. You both tumble over.