Okay, we have to start with London. It’s the oldest underground railway network in the world, opening in 1863. People call it “the Tube” because of the round, tunnel-like shape of its deep lines. But is it a subway? In the UK, we usually say “underground” or “metro,” but yes, it’s our most famous subway system.
London’s network has 11 lines and over 270 stations. That’s more stations than New York City has! Imagine trying to visit every single one in a day – you’d need a week and a very good pair of walking shoes.
