getting your own refs is invaluable! in the physical exploration and experiencing of an environment it becomes more memorable to you, and you can tailor your own references. when i can i do some photography in a place thatll inspire my comic, though thats not always possible.
i like using pinterest for finding references of all kinds; environment, costume, props. it has a pretty broad library of references and their algorithm for finding new stuff is really good
ive also seen people use google streetview; theyll drop in somewhere random and just draw what they see