Where to find June's key in Atomfall

Trying to find June's key to open her lockbox in Atomfall takes a bit of exploration. June was the owner of the Little Tea Room, but since this isn't actually one of the marked locations in Wyndham Village, it's understandable you'd be left scratching your head about where to obtain it. Below I'll explain where exactly to find June's key.

I'll also go over what to do with the strange note contained within the lockbox and how it relates to the Little Tea Room lead, i.e. how you can follow...