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Castle Geyser was named in 1870 by the Washburn-Langford-Doane Expedition due to its striking resemblance to the ruins of a castle. It has one of the oldest and largest sinter cones in Yellowstone, indicating that it has been active for thousands of years.
Old Faithful erupting at Yellowstone National Park
Old Faithful geyser erupting in the winter in Yellowstone National Park, Wyoming.
hotspring at yellowstone national park
Eruption of the Great Fountain Geyser in Yellowstone National park.
Old faithful geyser eruption at sunny blue sky, Yellowstone National Park, USA.
Old Faithful Yellowstone National Park, Wyoming, USA.
Old Faithful Geyser in Yellowstone National Park
Geyser erupting in Yellowstone
Old Faithful Geyser is one of the most famous geysers in the world, known for its regular eruptions. It was named in 1870 for its reliability in spewing hot water and steam at intervals of 60 to 110 minutes, reaching heights of 100 to 180 feet. Each eruption lasts about 1.5 to 5 minutes, discharging up to 8,400 gallons of water. Old Faithful is fueled by geothermal activity from the Yellowstone Caldera, a supervolcano, and has erupted more than a million times since the park's founding.
Yellowstone National Park -  Old Faithful Starting to Erupt - 1981. Scanned from Kodachrome slide.
Old Faithful geyser spouting steam in the air.\n\nTaken in Yellowstone, National Park, Wyoming USA
Eruption of the Great Fountain Geyser in Yellowstone National park.
Close focus on exploding smoke of old Faithful, famous geyser of Yellowstone, hot smoke with sulphur gas exploded in the air with dark background at sunrise.
Beehive Geyser at Old Faithful in Yellowstone National Park, Wyoming, USA.
Old Faithful Geyser, Yellowstone National Park
Behind a place sign, tourists watch Old Faithful Geyser erupt on Upper Geyser Basin in Yellowstone National Park, Wyoming
close up of hot blasting water from active gushing gayser in yellowstone national park in america, usa
Old Faithful, Upper Geyser Basin, Yellowstone National Park, USA
Spectacular panoramic views at Old Faithful Geyser in Yellowstone National Park, Wyoming Montana. Great hiking. Summer wonderland to watch wildlife and natural landscape. Geothermal.
Eruption of the Great Fountain Geyser in Yellowstone National park.
Norris Geyser Basin in Yellowstone National Park which is the hotest geyser basin in the park.  Porcelain Basin with hot springs, thermal algae; steam and various colors. Bacterial thermophiles.
The famous Old Faithful Geyser in the Yellowstone National Park, Wyoming USA
May 26, 2023 - Yellowstone National park, USA.  Visitors get a close up view of one of more than 10,000 thermal features in Yellowstone. Research on heat-resistant microbes in the park’s thermal areas has led to medical, forensic, and commercial uses.
Old Faithful, Yellowstone National Park, Wyoming USA
Castle Geyser was named in 1870 by the Washburn-Langford-Doane Expedition due to its striking resemblance to the ruins of a castle. It has one of the oldest and largest sinter cones in Yellowstone, indicating that it has been active for thousands of years.
White water erupts from Old Faithful geyser at Yellowstone National Park against a bright blue sky on a sunny summer day
Old Faithful Geyser Eruption\nYellowstone National Park
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