I'm a Londoner who always rides the Tube. Here are 10 features of the Underground that would surprise most Americans.

Source: Business Insider

The author travels on the London Underground — or Tube — several times a day. Roya ShahidiKnown as the Tube, the London Underground is an essential part of everyday life for most Londoners. Some of its characteristics are uncommon in American subway systems and can be confusing.