Cat houses

"Have you seen the cat houses?" my friend asks me and points down into the valley. I follow her finger but can't make out what she's pointing at.
"Where?" I ask her.
"Right there," she says. "I know they don't look like cats now, but they do sometimes. We call them cat houses."
It's a series of white apartment buildings, wide at the base and narrowing further up - vaguely the shape of power plant chimneys. Cat houses.