This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. YELLOWSTONE NATIONAL PARK, Wyo. (CNN) — ...

(CNN) -- Everyone knows the story of Old Faithful. Here's the story of Old Unreliable. The Steamboat geyser at Yellowstone National Park is the world's tallest active geyser, but it's unpredictable, ...

(CNN) — Everyone knows the story of Old Faithful. Here’s the story of Old Unreliable. The Steamboat geyser at Yellowstone National Park is the world’s tallest active geyser, but it’s unpredictable, ...