European architecture, with its combination of structural and decorative elements, has a wider range, in my opinion, of elements that can be looked at in metaphorical ways. I have a post half written, that describes my feelings about what I like to call "transitional spaces": the arch, balcony, and alleyway. I'll post it soon, along with photos from Bussana Vecchia (an international artist's colony) and other scenic, medieval towns in the Ligurian region of Northern Italy.
I wonder what Joseph Campbell would tell us about the symblogy of locks and doors, among other things... I'm sure they are the stuff of myths.
Image c Lynda Lehmann. Available at www.lyndalehmann.com.