"Draw the shape of the Bay". Mental maps of the #SF Bay Area by tourists and residents @exploratoriumpic.twitter.com/L0ZNWdX1Mg – at Exploratorium
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
I estimate they grow their collection by 10-20 new maps a day. Hope they keep them all.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.