The Jubilee line is a line on the London Underground that runs from Stanmore in the northwest to Stratford in the east. It was opened in 1979 and is known for its distinctive grey color on the Tube map. The line serves key areas such as Westminster, Canary Wharf, and London Bridge, making it an important route for commuters and tourists alike. The Jubilee line features 27 stations and is notable for its modern design, including several deep-level tunnels. It was extended in 1999 to connect to Stratford, enhancing access to the Olympic Park during the 2012 London Olympics.