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Mud Volcano and Sulphur Cauldron
A curious natural phenomenon, these mud pot attractions are caused by sulfuric acid that dissolves particles of clay and silica, which then mix with water to create the bubbling effect. Watch hydrogen sulfide, steam, carbon dioxide and other gases blast through the layers of mud. The attraction is located inside Yellowstone National Park, roughly 35 mi from the East Entrance.
Address: . WY USA
 1 307 344-7381
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Located just west of Canyon Village in central Yellowstone National Park, Norris Geyser Basin holds the title of the hottest and most changeable thermal area in the park. Learn about the area's features at the Norris Museum, or tour them up close via two loop trails. See Steamboat Geyser, the largest active geyser in the world.
Address: . WY USA
1 307 344-7381
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Glacial Boulder
A massive, house-sized granite boulder nestled in the forest by the road, Granite Boulder is a peculiar natural feature for visitors to observe while in Yellowstone National Park.
Address: . WY USA
1 307 344-7381
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