London Underground . The London Underground (also known simply as the Underground, or by its nickname the Tube) is a public rapid transit system serving the capital city London and some parts of the adjacent counties of Buckinghamshire, Essex and Hertfordshire in the United Kingdom.. The Underground has its origins in the Metropolitan Railway, the world's first underground railway.
Getting around london. The London Underground rail network, or "the Tube" is a great way to travel to and from central London and will be an integral part of most people's stay in the UK capital.
London underground fares, prices & maps 2019 plus best passes. London Underground map. The London Underground map is a classic design that when first launched was immediately taken up worldwide for similar systems.