Grotto Photos

Grotto Geyser, Yellowstone National Park.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07204  

Grotto Geyser, Yellowstone National Park.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07206  

Limestone and marble underground formations, Miller's Chapel grotto in Oregon Caves National Monument. Eons of acidified groundwater have slowly etched away at marble, creating the extensive and intricate cave formations in Oregon Caves National Monument.
Location: Oregon Caves National Monument
Image ID: 25863  

Limestone and marble underground formations, Miller's Chapel grotto in Oregon Caves National Monument. Eons of acidified groundwater have slowly etched away at marble, creating the extensive and intricate cave formations in Oregon Caves National Monument.
Location: Oregon Caves National Monument
Image ID: 25864  

Small waterfall amidst a grotto of ferns, moss and algae. This small oasis exists year round as a result of water seeping from the red sandstone walls of Zion Canyon.
Location: Zion National Park, Utah
Image ID: 12480  

Small waterfall amidst a grotto of ferns, moss and algae. This small oasis exists year round as a result of water seeping from the red sandstone walls of Zion Canyon.
Location: Zion National Park, Utah
Image ID: 12481  

Grotto Geyser erupts. Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13397  

Grotto Geyser erupts (right) while Rocket Geyser steams (left). Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13398  

Grotto Geyser steams (right) while Rocket Geyser erupts (left). Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13399  

Grotto Geyser sinter formation, a result of sinter covering old tree stumps, is unique among geothermal features in Yellowstone National Park.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13400  

Grotto Geyser steams. Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13401  

Grotto Geyser (left) and Rocket Geyser (right) erupt. Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13402  

Grotto Geyser erupts. Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13403  

Grotto Geyser (right) and Rocket Geyser (left) erupt. Upper Geyser Basin.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 13404  

Sarah's Cavern, a natural sea cave hidden below sea cliffs in Carlsbad, opening onto a flat beach at sunset, inner walls adorned with graffiti.
Location: Carlsbad, California
Image ID: 22196  

Sinter cone of oddly-shaped Grotto Geyser, thought to be formed over ancient tree stumps.
Location: Upper Geyser Basin, Yellowstone National Park, Wyoming
Image ID: 07205