Amazing Water Fountain of Burj Dubai Lake This is the largest and most expensive water fountain in the world. It is built and set in Burj Dubai Lake. It is over 900 feet long and can spray jets up to 500 feet high. The fountain can spray as much as 22,000 gallons of water in the air. Over 6,000 super lights and 25 color projectors help to create amazing dancing water sculptures. Watch the video to see the real beauty of this water fountain.