Affordable Travel Tips + Trip Planning on Instagram: "✨ Here’s everything you need to know. London’s underground transportation system, aka “the tube,” is easy to use. It’s relatively nice and clean and can get you anywhere in the city in a short amount of time. Here are the most important things you should know before riding: 1. Tap your phone when entering This will allow you to use Apple or Google Pay to pay. You can also use your actual card or an Oyster card to pay. These are the easiest an