Have you ever been traveling, and seen a building, landmark or other feature, and asked yourself - "what is that"?
I did, and envisioned a website that allowed a person to trace out that feature on top of Google Maps, and allow the Community to identify what it is.
Well, I was just talking to a colleague about Mumbai, and he proceeded to access WikiMapia to show various features of that city.
Turns out that wikimapia is fairly close to what I imagined. Google Maps, with the ability for the Community to mark geographic features. I think that a feature of the site called "identif this feature" would be useful. That way, a user could trace out something that they wanted to be identified, and another user could then do the identification.