Tube

This #Blue Bulls tagged image is courtesy of Flickr. Click on the Flickr account holder below the photograph to see more. Image by wallyg The London Underground is an all-electric metro railway system that covers much of the conurbation of Greater London and some neighbouring areas. It is the world's oldest underground system, and is the largest in terms of route length. Service began on January 10, 1863 on the Metropolitan Railway; most of that initial route is now part of the Hammersmith …