Every day, millions of commuters use the London underground system to travel around. For many, it's a part of their daily routine, no more inspiring than a walk to the bathroom. The majority of travelers have their faces buried in books and ears shut off from the world with headphones. But surprisingly, as it turns out, you can come across some really inspiring messages while on your way to the tube. Some of them encourage people to speak out on invisible illnesses, some are brilliantly clever puns, while some show the day's temperatures that are "100% accurate, 41% of the time," with Beverly Hills being scorching hot at 90210.