The Hong Kong–Zhuhai–Macau Bridge, also called the Hong Kong–Zhuhai–Macao Bridge, is a group of bridges and tunnels in the Pearl River Delta. It is long. It is made up of three bridges, one tunnel, and four artificial islands. It is the longest sea crossing on Earth. The bridges cross the Lingdingyang and Jiuzhouyang sea channels. They also connect Hong Kong, Zhuhai, and Macau.