![Castle Geyser | Yellowstone National Park, Wyoming, USA
By user: Flicka (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons](http://upload.wikimedia.org/wikipedia/commons/f/f2/Yellowstone_Castle_Geysir.jpg)
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Castle Geyser | Yellowstone National Park, Wyoming, USA
By user: Flicka (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons
Grand Prismatic Spring by Pete Piriya ( Yellowstone National Park, Wyoming )
Source: 500px.com
Castle Geyser | Yellowstone National Park, Wyoming, USA
By user: Flicka (Own work) [GFDL or CC-BY-SA-3.0-2.5-2.0-1.0], via Wikimedia Commons
Grand Prismatic Spring by Pete Piriya ( Yellowstone National Park, Wyoming )
Source: 500px.com
