[zenexer]

Based on my attempts to add local businesses, I'd say it can take quite a while, and some additions seem to just get "lost". Check back in a month or two--and that's assuming the addition includes sufficient photographic evidence. That's easy enough for businesses, but I don't know how they handle geographic features. They might just reject it.

[ttul]

It’s under review. I have added stranger things and they got into Maps within a short while.