Like most major cities, central London is geographically large and prone to congestion. This makes it difficult to see everything on foot and time consuming to use buses and taxis. Best advice: rely on the London Underground. Since becoming the world’s first underground train in 1863, The Tube has grown into a network of routes serving over one billion passengers a year. At first, the maps and labyrinth of hallways, stairs and platforms will be confusing. After a day or two, you will feel like a Londoner.