From Old Faithful to the lesser-known (but bigger!) Steamboat Geyser in the park's Norris Geyser Basin, Yellowstone is perhaps the best place in the world to see and learn about these hydrothermal ...

Old Faithful erupts more frequently than any of the other big geysers, although it is not the largest or most regular geyser in the park. Its average interval between eruptions is about 76 minutes ...

U.S. News Insider Tip: Escape the crowds directly in front of Old Faithful and enjoy the geyser's eruption from the second-floor outdoor balcony of the Old Faithful Inn, another national treasure.