Find the best Entrance - The London Eye entrance tickets at The London Eye, Inner London. The Merlin Entertainments London Eye (commonly the London Eye, or Millennium Wheel, previously the BA London Eye) is an extremely large passenger-carrying Ferris wheel situated on the banks of the River Thames in Central London in the United Kingdom. Standing at a height of 135 metres (442 ft 11 in),1 it is the largest Ferris wheel in Europe, and has become the most popular paid tourist attraction in the United Kingdom, visited by over three million people in one year. At the time it was erected, in 1999, it was the tallest Ferris wheel in the world.