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Lower Geyser Basin
Located just north of Old Faithful in Yellowstone National Park, Lower Geyser Basin is the park's largest geyser basin in terms of area. The basin boasts several interesting geothermal features, including Fountain Paint Pot and Great Fountain Geyser.
Address: . WY USA
 1 307 344-7381
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Yellowstone National Park's Upper Geyser Basin, also known as the Old Faithful area, features a number of thermal features, including geysers, pools and springs. Some of the area's most visited sights include Old Faithful Geyser, Castle Geyser and Giantess Geyser.
Address: . WY USA
1 307 344-2386
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