"Finally I came upon a pair of rooms missing entire walls, into which a little forest of underbrush and stunted trees had grown. I stood in the sudden breeze wondering what could possibly have done that kind of damage, and began to get the feeling that something terrible had happened here. I couldn't square my grandfather's idyllic stories with this nightmare house, nor the idea that he'd found refuge here with the sense of disaster that pervaded it. There was more left to explore, but suddenly it seemed like a waste of time; it was impossible that anyone could still be living here, even the most misanthropic recluse. I left the house feeling like I was further than ever from the truth. Miss Peregrine's home for peculiar children Chapter 3, Page 81"

An abandoned school for children.