Dragon's Mouth Spring, Yellowstone National Park Poster

"Dragon's Mouth Spring, Yellowstone National Park, Wyoming" by Catherine Sherman. One of my favourite areas in Yellowstone National Park, Wyoming was the Mud Volcano area, where you can see Dragon's Mouth Spring. You can't miss it. One of its nicknames is The Belcher, which is perfect, because it sounds like the hot spring is belching as the muddy water surges in waves. This photograph was taken in late August 2013. "The Crow saw the steam from this mud pot as snorts of an angry bull bison. An unknown European American gave it the current name. Its previous names include Gothic Grotto, Blowing Cavern, and The Belcher," according to the National Park Service. "The surging action has decreased since 1994, though no one is sure why. In 1999, more dramatic changes occurred: the water temperature dropped 10 degrees and the colour changed from green to chalky white."