(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, ...

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, sometimes ...