Inside Big Ben, a London icon that's been ringing since 1859

It's among the world's most photographed landmarks, a symbol of the United Kingdom and an engineering marvel.But London's Big ...
来自MSN

What's hiding inside Big Ben?

Discover the iconic clock tower, Big Ben, located in London, England. This remarkable structure has been in operation for nearly 150 years. The video features an exploration of Big Ben's mechanical ...