Ha ha, check out the amount of space Twitter provides for writing a message on an iPhone 5pic.twitter.com/ZVmeg1qCY9
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
That doesn't look like stock Twitter or Twitter's iOS integration.
It's Twitterrific; 3rd party app
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.