"Emerald Chamber," Sunset over Morning Glory Pool, Upper Geyser Complex, Yellowstone National Park, Wyoming

Storm clouds line the sky at sunset as the clear, orange, emerald and turquoise colored water reveal the deep chamber of Morning Glory Pool in Upper Geyser Basin of Yellowstone National Park. Cyclops Spring can be seen steaming on the hillside on the upper left, while Sentinel Geyser can be seen erupting behind the trees in the middle.

"Enchanted Forever," Shield Spring, Upper Geyser Basin, Yellowstone National Park, Wyoming

Sunlght beams filter through the trees, fog and mist and onto the clear turquoise waters of shield spring

"Earth's Fury," Vent Geyser, Turban Geyser, West Triplet Geyser and the Grand Geyser Complex, Upper Geyser Basin, Yellowstone National Park, Wyoming

Storm clouds rage overhead as a rainbow forms in the 75 foot hight erupting water of Vent Geyser. Turban Geyser (erupting to a height of 20 feet), Percolator Geyser, and West Triplet Geyser all erupt as well. Grand Geyser, the largest member of the Grand Geyser Complex, has ceased erupting (though water in it's pool is still visable next to Turban Geyser). Rift Geyser's pool can be seen in the back near the forest trees, visable between Percolator Geyser and West Triplet Geyser. The Grand Geyser Complex (geysers or their pools) visable from left to right: Vent Geyser, Turban Geyser, Grand Geyser, Percolator Geyser, Rift Geyser, West Triplet Geyser.

"Golden Glass," Upper Terraces, Mammoth Hot Springs, Yellowstone National Park

Water flows down the hills on the Upper Terraces of Mammoth Hot Springs in Yellowstone National Park

"Color Palette," Palette Spring, Yellowstone National Park

Water flows down the hillside creating a palette of colors where different types of heat-resistant bacteria thrive.

"Faithful Magic," Alpenglow on Old Faithful at Sunset, Yellowstone National Park, Wyoming

The water spray of Old Faithful illuminates pink with Alpenglow at sunset in the Upper Geyser Basin of Yellowstone National Park (Wyoming).

"Steam Blast," Old Faithful Sunset, Yellowstone National Park

Light from the setting sun reflects off of Old Faithful as it erupts high into the air above Upper Geyser Basin in Yellowstone National Park in Wyoming. Old Faithful erupts 106 to 185 ft high every 90 minutes, with a water discharge of 3,700–8,400 US gallons every eruption.

"Blowhole," Old Faithful at Sunset, Yellowstone National Park, Wyoming

Old Faithful erupts high into the air above Upper Geyser Basin in Yellowstone National Park

"Smoking Fortress," Castle Geyser Sunset, Yellowstone National Park, Wyoming

Sunset lights the skies behind Castle Geyser in Upper Geyser Basin at Sunset, as the light from the setting sun illuminates the water spray from the Geyser with a pink glow. Castle Geyser has a height of 90 feet.

"Water Twister," Grand Geyser Sunset, Yellowstone National Park, Wyoming

Sunset illuminates the skies above Grand Geyser in Upper Geyser Basin as the light from the setting sun reflects off the water spray from an eruption. Grand Geyser has a height of 200 feet. It is the tallest predicable geyser in the world.

"Vortex," Grand Geyser Sunset, Yellowstone National Park, Wyoming

Backscattering at sunset illuminates the skies above Grand Geyser in Upper Geyser Basin as the light from the setting sun reflects off the water spray from an eruption. Grand Geyser has a height of 200 feet. It is the tallest predicable geyser in the world.

"Grand Eruption," Grand Geyser Nautical Twilight, Yellowstone National Park, Wyoming

Nautical Twilight sets in over an erupting Grand Geyser in the Upper Gesyer Basin of Yellowstone National Park as the first star of the night begins to shine in the skies above. Grand Geyser has a height of 200 feet. It is the tallest predicable geyser in the world.

"Eruption," Sunset over Old Faithful, Yellowstone National Park

Old Faithful erupts high into the air above Upper Geyser Basin in Yellowstone National Park

"Canary Terrace," Canary Spring, Yellowstone National Park

Canary Spring in Yellowstone National Park get's its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

Canary Spring, Yellowstone National Park

Canary Spring in Yellowstone National Park get's its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

"Canary's Color," Canary Spring , Yellowstone National Park

Canary Spring in Yellowstone National Park gets its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

"Canary's Cliffs," Canary Spring, Yellowstone National Park

Canary Spring in Yellowstone National Park gets its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

"Canary," Canary Springs, Yellowstone National Park

Canary Spring in Yellowstone National Park gets its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

"Canary Flow," Canary Spring, Yellowstone National Park

Canary Spring in Yellowstone National Park get's its name from yellow color near the top of the spring. Water flows down the hillside creating an array of colors where different types of heat-resistant bacteria thrive.

White Dome Geyser, Yellowstone National Park

White Dome Geyser, a Geyser in Lower Geyser Basin, erupts 30 feet into the air from it's 12-foot-high geyserite cone (one of the largest in the park).

Orange Spring Mound, Yellowstone National Park

This travertine mound int he hot springs of Yellowstone National Park is covered with orange bacteria and algae which create the streaks of brillant color

Orange Spring Mound, Yellowstone National Park

This travertine mound int he hot springs of Yellowstone National Park is covered with orange bacteria and algae which create the streaks of brillant color