point of tourism in london the Big Ban is the nickname for the great bell of the clock at the north end of the Palace of Westminster in London, and often extended to refer to the clock and the clock tower, officially named Elizabeth Tower, as well. Elizabeth Tower holds the largest four-faced chiming clock in the world and is the third-tallest free-standing clock tower. It celebrated its 153th anniversary on 31 May 2012,during which celebratory events took place.

living london