London’s iconic clock tower, Big Ben is one of the city’s renowned landmarks known for its gigantic bell and accuracy. The bell alone weighs 13.7 metric tons, usually associated with the entire clock tower of the Houses of Parliament. Big Ben is one of London’s most sought-after attractions, which looks splendid after dusk when the clock faces of the tower are illuminated. Big Ben was formerly known as St. Stephen’s Tower until 2012 and then it was christened Elizabeth Tower on the auspicious event of the Queen’s Diamond Jubilee. It marked the celebration of 60 years of the British throne. The clock hands measure 9 feet and 14 feet long and rise high around 320 feet, which is a sight to behold for tourists visiting London from all parts of the world. Big Ben stands proudly over 96 metres, and you need to ascend 334 steps to reach the belfry, the part of the clock tower in which the bells are installed. You will also need to climb 399 steps to the Ayrton Light right at the top of this imposing tower in London. Ayrton Light is the lantern at the top of Big Ben, which is lit when the House of Parliament sits after dark. Sir Edmund Beckett Denison designed the iconic clock with the collaboration of Sir George Airy and Edward Dent, the clockmaker. Edmund’s prime contribution was a unique gravity escapement, which imparted unparalleled accuracy to the Big Ben.