# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2014-01-28 08:21:15 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/428080314863583233) RT @andrewellson: There are 23 miles of 'secret' tube lines under Central London that could soon be opened to tourists http://t.co/siAps8o1…