I had NO IDEA. Why was I not alerted to this?? The Monument in London is hollow and was built (1671-1677) as a multi-purpose scientific instrument.pic.twitter.com/Z57TyEmnbb
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
Hard to resist a secret tunnel! *gets out Nancy Drew torch* :-)
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.