Introduction to the Middle Fountain Basin: The famous landscape of the Middle Fountain Basin is the "Grand Prismatic Spring" (Grand Prismatic Spring). The diameter of the pool is 115 meters and the water temperature is as high as 86°C. It is the largest hot spring pool in Yellowstone Park and is colorful. , with rainbow-like colors of red, clear, yellow, green, blue, indigo, purple, etc., it is very beautiful from a distance. The nearby Excelsior Geyser is the tallest fountain in Yellowstone Park, with a record of 90 meters. The last time it erupted was in 1983. Other landscapes include: Opal Pool, Turquoise Pool, etc.
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