The Clock Tower, commonly known as Big Ben, is a iconic clock tower located at the north end of the Palace of Westminster in London, England. The tower stands 96 meters tall and is one of the most recognizable landmarks in the world. Its four dials, each 23 feet in diameter, are made of opal glass and are illuminated at night. The clock's four-faced chiming clock, known as the Great Bell, is the largest in the world, weighing over 13 tons. The tower's intricate Gothic Revival architecture and stunning clock faces make it a must-see attraction for visitors to London.