My friends bought a home in FL that was built around an indoor swimming pool. The house was a U-shape and every room (except bathrooms) opened onto the pool deck.

I think hand cranked dumbwaiters are pretty much gone for good.

Milk doors. Small doors usually adjacent to side entrances, where the dairymen would leave products.

Trash compactors were big in new $$$ homes when I was a kid. We were impressed when people installed them in their existing homes.

Solid oak doors. Oak everything. This house was built in the 90's but to old standards. It was oak plate rails in the walls. I was going to have them removed when I repainted, but they are glued and screwed to the walls. Removing them would have cost a small fortune, so I left them up... As a result, this house is incredibly solid and very, very quiet. Even my WIC has solid oak doors. Why? Who knows. I'm pretty sure this house could take a direct hit from a nuclear missile and not be worse for wear.