A cable-stayed bridge is a type of bridge where the deck is supported by cables that are connected to one or more vertical towers, known as pylons. The cables are arranged in a fan-like pattern, distributing the weight of the bridge evenly. This design allows for longer spans compared to traditional beam bridges and provides a visually striking appearance. These bridges are commonly used for crossing large bodies of water or deep valleys. They are known for their strength and stability, making them suitable for heavy traffic. Examples of famous cable-stayed bridges include the Millennium Bridge in London and the Leonard P. Zakim Bunker Hill Memorial Bridge in Boston.