The Port Fountain or Karachi Port Trust Fountain is located next to the northern rock of a series of islands known as the Oyster Rocks, off the Karachi Harbour. The fountain is the world's second tallest, and rises to height of 620 feet (190 m) when operating at full force. Ever since its inauguration on January 15, 2006, the fountain has been attracting visitors from all over Pakistan. The fountain structure and platform of 135 sq meters (15 m x 9m) is on 16 piles 18 meters deep. Two 835 horsepower (623 kW) turbine pumps deliver nearly 2000 liters of sea water per second at a velocity of 70 meter per second through specially designed 8-inch (200 mm) nozzles. The fountain was constructed at a cost of PKR 320 million (approximately $5.3 million US).