For some reason this reminds me. My old house, built in the 40s, had a mysterious small hatch in the closet floor across from the bathroom.
One day I opened it and it was just a cutout of the floor, directly over the washing machine in the basement below. I'm not sure if that's lazy or genius, but it doesn't get much easier than that I guess.
One day I opened it and it was just a cutout of the floor, directly over the washing machine in the basement below. I'm not sure if that's lazy or genius, but it doesn't get much easier than that I guess.