Travelling around London is a lot like being a gopher. You go down a tunnel, get on a train, get off, and pop your head out at the surface to see where you are. At first it is an intimidating experience, especially if, like me, you are from a city that has no subway system. But once you are used to it, travelling by underground is not only convenient, it is also a lot of fun.
What is your favourite subway system in the world that you have travelled? Let us know in the comments below.