I visited Yellowstone National Park in Summer 2001, It is one of the most remarkable natural wonders I have ever seen. The surraounding cliffs of upper Yellowstone Water Fall is actually

Yellow, and emerald color bubbling hot water pools were scary but gushing Old Faithfull is really astonishing.The freely wondering Buffalo and other park animals and evergreen trees brings the nature so close to our hearts. Yellowstone is simply great. Glad I went there.