Yellowstone's Thermal Springs  
  Wyoming, USA  
   
  The Blue Star Spring, one of Yellowstone's many colorful and attractive thermal springs or pools.  These generally are very clear, showing off their colors like peacocks.

 
   
  Many shades of lovely blue and green looking down into the Morning Glory Pool.   
   
  The Heart Spring, perhaps named by a doctor.  I suppose it does resemble a human heart in its shape and the appearance of two chambers.  The springs were both striking and easy to photograph.  They reflect sunlight into all of these different green and blue shadings.    
   
  Here I was attempting to photograph something else, a thermal lake covered in steam.  By Yellowstone standards,
this isn't very attractive.  But the sudden flash of lightning gave me a special picture by sheer luck.   

 

       
   
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Other Links

 

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USA Thermal

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Usa Yellowstone's Thermal Spring

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United States Of America Thermal Spring