Yellowstone National Park is home to many natural wonders, including the famous Old Faithful geyser. Old Faithful is known for its predictability, as it erupts approximately every 90 minutes to two hours. This makes it a popular attraction for visitors to the park, who gather around to witness the impressive display of water shooting high into the air.

The eruption of Old Faithful is caused by the build-up of pressure in the underground reservoir of hot water. When this pressure becomes too great, the water is forced out through the narrow vent of the geyser, creating a spectacular sight that can reach heights of up to 180 feet.

Old Faithful is not the only geyser in Yellowstone National Park, but it is certainly the most famous. Its reliability and impressive displays have made it a must-see for anyone visiting the park. In addition to the geyser itself, there is also a visitor center nearby where you can learn more about the geology and history of the area.

If you are planning a trip to Yellowstone National Park, be sure to check the schedule for Old Faithful so you can time your visit to see it erupt. While the exact timing of each eruption may vary slightly, you can generally expect to see it go off every hour or so. It is truly a sight to behold and a highlight of any visit to the park.

So, if you find yourself at Yellowstone National Park and are wondering what geyser erupts every hour, look no further than Old Faithful. Its reliable schedule and impressive displays make it a must-see attraction for anyone exploring the wonders of this beautiful national park.

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