While South Bank is not formally defined, it is generally understood to bounded by Westminster Bridge and Blackfriars Bridge, and to be centred approximately half a mile (800 metres) south-east of Charing Cross. The name South Bank was first widely used in 1951 during the Festival of Britain. The area's long list of attractions includes the County Hall complex, the Sea Life London Aquarium, the London Dungeon, Jubilee Gardens and the London Eye, the Southbank Centre, Royal Festival Hall, National Theatre, and BFI Southbank. In addition to their official and business functions, both the County Hall and the Shell Centre have major residential components.