Hi Emilio!
Yeah, we've been facing that dilemma in Austria for a few years now, with 97% photo coverage of all monuments in Austria. This year we started "WikiDaheim" (translates to "Wiki in your home area"), which not only takes into account the monuments, but other aspects of everyday life in Austria. In case you're not fluent in German (who is, anyway? ;-) ), Google Translate does work on the website :-)
Best,
Philip
P.S.: I apologise if my post is already too off topic, but I do think that this issue is something that in the long term everyone will face.