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"Upper Geyser Basin" is located within Yellowstone National Park and features some of the world's largest and most active mud pots. This area is characterized by its unique geothermal activity, which includes an impressive concentration of geysers, hot springs, and fumaroles. The mud pots are a particular highlight, with their bubbling, steaming mud providing a fascinating glimpse into the park's volcanic forces at work. "Upper Geyser Basin" is also home to several iconic geysers, including Old Faithful, which erupts on a predictable schedule and draws crowds of visitors from around the world. The basin's unique hydrothermal features are surrounded by lush meadows and forests, providing a stunning contrast between the vibrant, colorful mud pots and the natural beauty of the park.