Underground city made from old opal mines has 3,500 residents http://boingboing.net/2017/02/07/underground-city-made-from-old.html …pic.twitter.com/tWnCgf36tA
3:52 PM - 8 Feb 2017
0 replies
11 retweets
15 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.