Review:

The Upper Geyser Basin in Yellowstone National Park is known for having the largest population of geysers, including some of the biggest in the world.

Among them is the most notable of all – Old Faithful Geyser, which erupts the most consistently and frequently.

There are four additional large geysers to check out: Daisy, Castle, Grand, and Riverside.

For the best chance to see them erupt, visit the Old Faithful Visitors Center to get daily prediction times.

There are hundreds more geysers and hot springs, plus a Morning Glory Pool, unique observation points, and asphalt and dirt trails all along the Firehole River.

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