The London Eye is the landmark whose fireworks helped define London's modern New Year's Eve celebrations.
The London Eye is a giant observation wheel on the South Bank of the River Thames. Its prominent position opposite Westminster made it a natural visual centerpiece for London's televised midnight celebrations. Fireworks launched around the wheel and along the river create a spectacle visible from many parts of central London.
The wheel opened to the public in 2000, after serving as a major Millennium-period project. Its formal name has changed under sponsorship agreements, but “London Eye” remains its widely recognized name. The New Year's Eve fireworks are organized by the Mayor of London and are separate from the wheel's original construction purpose.
Big Ben is also strongly associated with London's countdown because its clock tower and chimes mark midnight, but it is not the landmark around which the signature fireworks display is arranged. The London Eye therefore provides the specific answer to this landmark question.