The fountain installed at Banpo Bridge in Seoul is 1,140-meter-long ( 570 meters on each side). It holds Guinness world record for the Longest bridge fountain. It has 10000 led nozzles which spout 190 tons of water per minute some 20 meters out from the bridge and into the Han River. It uses the water from the river. LED nozzles were installed to the bridge in September 2009. The Bridge connects the Seocho and Yongsan districts. The construction of the bridge was completed in 1982.

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Rainbow Bridge is the largest natural bridge in the world at 290 feet (88 meters) tall and 270 feet (83 meters) across. The bridge has been formed by erosion of the sandstone by water flowing from Navajo Mountain towards the Colorado River. The bridge can be reached by a two-hour boat ride on Lake Powell from either of two marinas near Page, Arizona. It is located in one of the most rugged and remote regions of the United States, it was discovered in 1909 by an expedition that set out to find the great stone arch rumored by the Native Americans.

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A rainbow is an optical and meteorological phenomenon that causes a spectrum of light to appear in the sky when the Sun shines on to droplets of moisture in the Earth\’s atmosphere. It takes the form of a multicoloured arc, with red on the outer part of the arc and violet on the inner section. Rainbows can be observed whenever there are water drops in the air and sunlight shining from behind at a low altitude angle.

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