Odd feature, spotted from a friend's house.
They have a house which the original owner himself built. Let's say there was lots of electrical code violations until a few months ago, when they were remodelling it. Apparently, the owner bought wire on what was on sale that week.
Same house also has this weird little structure in the rather large backyard. It looks like the house, but its separate. It has two, teeny, tiny, rectangular rooms separated by a single, temporary plywood board, and looks like it could have been a toolshed, if not for the pet-shaped hole at the bottom of it. It has a wall that is pretty much one giant, flat-topped arch, a door to the left of that wall (same wall with the door is the one with the pet shaped hole), and a window on the other side. Very, very weird.
Also, another only one closing door between us and a toilet. The floorplan is very open on the front. You come in through the door, to the immediate left is our now dining room (formerly a family room), straight ahead is the hallway to the two bedrooms and one master (with bath), and one common bathroom. On the right is the front of the house, which segues first into the kitchen (on the opposite of the kitchen was our former dining room, now holds an island), and then into the living room. The living room might be an oddity to the rest of our housing tract; it's much larger. Dad designed it according to the golden ratio for sound, so it's around 20x15 feet, length and width, (exact numbers escape me now) but the builders forgot to extend the back porch, so it's teeny tiny.