Buzz·Posted on 21 Mar 201327 Extraordinary Facts About The London UndergroundThe Tube is the smelly, dirty but incredibly useful heart of London. Here are a few things you might not know about it.by Ailbhe MaloneBuzzFeed Staff, UK LinkFacebookPinterestTwitterMail 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27.