Did you know this is one of the most significant sight-seeings in England? A tall and proud historical building called the "Clock Tower". The name Big Ben is often used for both the Great Bell and the Elizabeth Tower in the Palace of Westminster. In total there are 5 bells in the tower. The tower is a significant British cultural icon. Back in 2009, there was a celebration of the 150th anniversary. People from all over the world travel to London to see it.