Several years ago, I got hooked on a TV show called "Tree house Masters." It features Pete Nelson and his crew, going around the country, building custom tree houses.
There was a time, not so long ago, that I couldn't have told there was such a thing as an old grain silo/corn crib that was now serving as a trendy bed and breakfast.
I don't know if it's still out there or not, but there used to be a TV show called, "You Live in WHAT?" It showed all manner of structures that had been repurposed into places to live.