The entrance to the Iron Age underground passage or fogou at Carn Euny, Cornwall.pic.twitter.com/P23dQSqH0Z
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
Interesting topic for a Ph.D. thesis. Or three :)
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.