Yellowstone National Park is one of the world's most famous attractions. That’s the world's first national park, which was founded in 1872. The area of this unique biosphere reserve occupies around 900 000 hectares. Every year, it’s visited by about 3 million people from around the world. The main feature of the reserve is not its rich nature and picturesque landscapes, but the unique geothermal facilities.
In fact, Yellowstone is a huge geyser field in the park. There are about 3 000 geysers. One of the main symbols of the park is the Grand Prismatic Spring. It’s the largest hot spring in the United States and third largest in the world. Its images taken from a height are simply amazing. The beautiful lake is iridescent. This unusual color of the water is due to pigmented bacteria colonies, the color of which varies depending on the time of year.
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