Wow -- as yet, both of the last two Unidentified Earth installments, numbers 20 and 21, remain unidentified. Time for another hint for number 20, I guess. Part of this location -- but not the part featured -- appeared in a pretty well-known film, albeit as a different location within the film. Confused? I thought so! In other words, in the movie this location was referred to as someplace else.
I'll hold off on hints about Number 21 until after it's gone unidentified for more than a week.