A couple of posts ago, I posted a pic and asked what you thought it was... those of you who guessed the Artic Circle were correct! It was taken out of our airplane window in July 2005 as we went to China for the first time... it was quite beautiful to see that stretching as far as you could see. Since it was summer, it was partially melted.
Congrats to the picture sleuths... I should offer a prize; but alas, I don't have one. :)