A rainbow rises over Ledge Geyser in Yellowstone National Park, Wyoming. "Ledge is the second largest geyser in the Norris Geyser Basin, capable of shooting water 125 feet into the air. Because it erupts at an angle, however, the water will sometimes reach the ground 220 feet away." - NPS
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A rainbow rises over Ledge Geyser in Yellowstone National Park, Wyoming. "Ledge is the second largest geyser in the Norris Geyser Basin, capable of shooting water 125 feet into the air. Because it erupts at an angle, however, the water will sometimes reach the ground 220 feet away." - NPS
A picturesque shot of the sun setting while driving through north Yellowstone National Park, Wyoming.
A picturesque shot of the sun setting while driving through north Yellowstone National Park, Wyoming.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.
An explosive eruption of silica water erupts from Beehive Geyser located in the Upper Geyser Basin in Yellowstone National Park, Wyoming. The Upper Geyser Basin is also home to the famous Old Faithful geyser which sits just behind Beehive Geyser in the distance.
This photo shows a river with thermal views below the bridge near the Monument Geyser Trailhead in Yellowstone National Park, Wyoming.
This photo shows a river with thermal views below the bridge near the Monument Geyser Trailhead in Yellowstone National Park, Wyoming.
The Gibbon River, named for Colonel (later General) John Gibbon, who was a member of an early exploring survey of the Yellowstone region, starts near the Center of Yellowstone National Park. All of the outflow from Norris Geyser Basin drains into the river, which merges with the Firehole River in the west part of the park to become the Madison River.
The Gibbon River, named for Colonel (later General) John Gibbon, who was a member of an early exploring survey of the Yellowstone region, starts near the Center of Yellowstone National Park. All of the outflow from Norris Geyser Basin drains into the river, which merges with the Firehole River in the west part of the park to become the Madison River.
Beryl Spring, in the Gibbon River Canyon, is chemically complex—it has a pool with a basic composition and a steam vent with an acidic composition! It’s location next to the highway has caused numerous problems for the road, requiring some creative engineering solutions and a lot of geological expertise!
Beryl Spring, in the Gibbon River Canyon, is chemically complex—it has a pool with a basic composition and a steam vent with an acidic composition! It’s location next to the highway has caused numerous problems for the road, requiring some creative engineering solutions and a lot of geological expertise!
A bison is seen shuffling slowly down a road in Yellowstone National Park. The bison appears to be staying to the shoulder allowing others to safely bypass. The bison was safely recorded from inside a stopped vehicle. Never approach bison on the roadway.
A bison is seen shuffling slowly down a road in Yellowstone National Park. The bison appears to be staying to the shoulder allowing others to safely bypass. The bison was safely recorded from inside a stopped vehicle. Never approach bison on the roadway.
In Yellowstone, a clue about whether a thermal feature is acidic or basic is the style of the feature. Pools of water are generally basic, while mud pots are acidic. Blue Mud Steam Vent is a classic example of an acidic mud pot.
In Yellowstone, a clue about whether a thermal feature is acidic or basic is the style of the feature. Pools of water are generally basic, while mud pots are acidic. Blue Mud Steam Vent is a classic example of an acidic mud pot.
Cinnamon Spouter, in Black Sand Basin, has long stretches of bubbling activity. A “sizziling fracture” was first noticed at this location in 1933, but little more was noted until the current spouting pool developed in 1988–1989.
Cinnamon Spouter, in Black Sand Basin, has long stretches of bubbling activity. A “sizziling fracture” was first noticed at this location in 1933, but little more was noted until the current spouting pool developed in 1988–1989.
Named for a visit in 1891 by members of the Fifth International Geological Congress, the feature in Norris Geyser Basin has behaved as a quiet pool, geyser, and roiling mud pot.
Named for a visit in 1891 by members of the Fifth International Geological Congress, the feature in Norris Geyser Basin has behaved as a quiet pool, geyser, and roiling mud pot.
A foggy, early morning view looking down the Gibbon River, off of Grand Loop Rd in Yellowstone National Park, Wyoming.
A foggy, early morning view looking down the Gibbon River, off of Grand Loop Rd in Yellowstone National Park, Wyoming.
This mudpot is located at the upper level of the trail at the Artists' Paintpots in Yellowstone National Park, Wyoming. Some people will smell rotten eggs, others might even pick up the scent of hickory-smoked ham.
This mudpot is located at the upper level of the trail at the Artists' Paintpots in Yellowstone National Park, Wyoming. Some people will smell rotten eggs, others might even pick up the scent of hickory-smoked ham.

Mud Pool is located near the Daisy Geyser complex, not far from Old Faithful. Since the 1980s it has acted as a perpetual spouter.
Mud Pool is located near the Daisy Geyser complex, not far from Old Faithful. Since the 1980s it has acted as a perpetual spouter.
"Tucked away in the Norris Geyser Basin is Steamboat Geyser, the world’s tallest active geyser. Its major eruptions shoot water more than 300 feet (91 m). Only Waimangu Geyser in New Zealand has rocketed to greater heights—but not in more than one hundred years.
"Tucked away in the Norris Geyser Basin is Steamboat Geyser, the world’s tallest active geyser. Its major eruptions shoot water more than 300 feet (91 m). Only Waimangu Geyser in New Zealand has rocketed to greater heights—but not in more than one hundred years.
The tallest geyser in the world, with eruptions that exceed 120 meters (400 feet), Steamboat Geyser is known for experiencing years of frequent eruptions followed by years to decades of very few eruptions. The geyser has been in a more active period since 2018.
The tallest geyser in the world, with eruptions that exceed 120 meters (400 feet), Steamboat Geyser is known for experiencing years of frequent eruptions followed by years to decades of very few eruptions. The geyser has been in a more active period since 2018.
Although Terrace Spring may appear to be boiling, but it’s temperature is a relatively cool 140 F (60 C). The roiling in the pol is caused by carbon dioxide bubbles. Thousands of years ago, when Yellowstone’s climate was wetter, the water of the springs had a different composition, allowing travertine to form—just like that seen today at Mammoth Hot Spring
Although Terrace Spring may appear to be boiling, but it’s temperature is a relatively cool 140 F (60 C). The roiling in the pol is caused by carbon dioxide bubbles. Thousands of years ago, when Yellowstone’s climate was wetter, the water of the springs had a different composition, allowing travertine to form—just like that seen today at Mammoth Hot Spring
Looking down from the lookout point at Brink of Lower Falls, over the Yellowstone River, as it flows eastward through the "Grand Canyon of Yellowstone".
Looking down from the lookout point at Brink of Lower Falls, over the Yellowstone River, as it flows eastward through the "Grand Canyon of Yellowstone".
Looking down from the lookout point at Brink of Lower Falls, over the Yellowstone River, as it flows south into the distance.
Looking down from the lookout point at Brink of Lower Falls, over the Yellowstone River, as it flows south into the distance.
Looking down on the lower portion of Artists' Paintpots in Yellowstone National Park, Wyoming. Artists' Paintpots is a hydrothermal area with many colorful mud pots, hot springs, and geysers.
Looking down on the lower portion of Artists' Paintpots in Yellowstone National Park, Wyoming. Artists' Paintpots is a hydrothermal area with many colorful mud pots, hot springs, and geysers.
Cinnamon Spouter is located on the Black Sand Basin Trail in Yellowstone National Park, Wyoming.
Cinnamon Spouter is located on the Black Sand Basin Trail in Yellowstone National Park, Wyoming.
This feature, not far from Old Faithful, has never been known to truly erupt. It gets its name from adjacent Chinaman Spring, which received its name because a concessioner (who might have been of Japanese descent) in the early days of the park used that spring as a laundry.
This feature, not far from Old Faithful, has never been known to truly erupt. It gets its name from adjacent Chinaman Spring, which received its name because a concessioner (who might have been of Japanese descent) in the early days of the park used that spring as a laundry.