We'll first tell you about it, and then describe itineraries for touring it by auto. Sometimes it seems like all Hell is breaking loose in Wyoming's vast and amazing Yellowstone National Park . There Everybody knows about Old Faithful Geyser , but its periodic eruptions sending jets of boiling water shooting more than 150 feet into the air make up only part of the park's ongoing thermal extravaganza. You can easily watch even bigger geysers blow their tops, too, if not quite so regularly. All around you, the park's many hot springs froth wildly, shooting forth clouds smelling of brimstone.
Smoke holes spout noisily.
Mud caldrons bubble ominously. Steaming rivers, flowing through water-scalded valleys, appear on fire. As many as 300 geysers. Ten thousand hot spots of all kinds. At every turn, you cannot help but gape in awe.