Hi,
I was just talking about it during WLM session on Wikimania. See the project made by our local, friendly competitors:
At the moment they collect monument data in a collaborative way.
First - you can search for the monument, then you can improve data - by better placing the monument on map, changing address to more up-to-date etc. See how easy it is for contributors in comparison with editing wiki-tables...
Their next step is to make a separate page about each monument where people will upload their pictures, write stories and descriptions of monuments...