Although its average interval has lengthened through the years ... was a century ago. In this QTVR, visitors standing between Old Faithful and the Old Faithful Inn watch the geyser erupt.

For every Old Faithful and Grand Canyon of the Yellowstone, there's a host of other obscure places like The Gumper, Lactose ...

The geysers, mud pots, and hot springs of Yellowstone National Park have attracted countless tourists for the better part of 150 years ... Old Faithful to the lesser-known (but bigger!) Steamboat ...

Several visitors reported waiting a long time (some more than an hour) for the geyser to erupt ... Keep in mind, the Old Faithful Visitor Center is open year-round with seasonal hours.