Troll A Platform, North Sea, Norway

World records
• In 1996 the platform set the Guinness World Record for 'largest offshore gas platform'.
• In 2006, the 10th anniversary of Statoil's operatorship of Troll gas production was celebrated with a concert by Katie Melua held at the base of the Troll A platform. As well as entertaining the workers on the rig, the concert set a new world record for the deepest underwater concert at 303 metres below sea level.