On our trek last summer from Ontario to Vancouver Island, we opted to travel through the upper United States. Our intension was to check out various attractions along our route. One of our must do stops along the way was Yellowstone National Park. 
As you can see, we had a cool, wet cloudy day, but that did not slow us down.
And now for a bit of history. Formed over 10 million years ago, Yellowstone was created by volcanic activity, and the resulting caldera contains the largest super volcano on the continent. The park covers the states of Wyoming, Montana and Idaho, for a total of some 3500 square miles.
The geothermal activity still continues today, with old faithful being the big drawing card. For us, this old blow horse was a bit of a bust. It went off on schedule, but being a cool day, so much steam was created, and it was difficult to see the actual geyser. 
The rest of our walk did not disappoint. The geothermal activity painted a picture that was eerie and out of this world. At times the steam was so thick that my wife, who was ahead of me, took on a rather ghost like appearance.
Great Colours and wonderful patterns, a truly Out of this World experience.
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Very good and most interesting take on the challenge, Dan. Spectacular photos!
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Was not my first choice, but I thought, why not. Thank you for dropping by and your comment. Cheers.
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Hi there. I am enjoying the Out of this World blog courtesy of RuthSARC whom has also contributed.
I like your photos very much. There is a similar geothermal experience in central New Zealand. Particularly the Craters of the Moon geothermal site, and Orakei Korako situated between Rotorua and Taupo, New Zealand. Thanks for sharing your shots. Kind regards, Denise
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The designs that the minerals created were quite amazing. I just wish we had had a sunny day. cheers.
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That reminds me a great deal of Paris Mountain in Anglesey, Wales, although the drama there is all man made – spoilage from the mining industry over the centuries. Great photos – very dramatic.
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