Yanbu is an important petroleum shipping terminal and is home to three oil refineries, a plastics facility and several other petrochemical plants. It is the country's second port (after Jeddah) and serves as the main port for the holy city of Medina, 160 km (99 mi) to the east. The natural harbour is protected on both sides by wide coral reefs. These reefs remain mostly untouched making them excellent areas for diving. Three major oil pipelines lead across the desert from the oilfields in the east to terminate at the Red Sea in Yanbu
