JJohnson1701 - definitely. Something where we can pull up a map of, say, England, and click on the language links to see the names in foreign languages, and click on that language's article on that city, village, or whatever. That'd be awesome. Perhaps it would need a list of the places, perhaps in system messages, and then a translation as well.
JosN A Wikiatlas exists on Commons already. That could be transferred to a new Wikiearth, Wikiatlas or whatever. A atlas with a lot of information does not seem logical to me for Commons, so, a new wiki would be preffered, I guess.
User:WikiEarth I really like the idea of having a wiki atlas, even before I saw this proposal. I made my own wiki called wikiearth if you want to check it out.