Okay yeah, absolutely. There are big city-sized ruins here and there … but they’re really rare. Like I think you could set up a big monstrous expedition up to Angmar or something. I guess I’m thinking about smaller hoards. LIke Phil mentioned a wight’s hoard. Do wights hoard stuff? I mean I don’t really feel that connected to the Tolkien canon but they really don’t talk about what critters do and do not collect shit. 

I guess I can just guess. Wolves no, orcs probably, etc.