Do you know of other stories like this about Poland?
The legend which Des Essientes told you seems to be an American version of that legend (never heard it before, though I've checked it and indeed there is such version of the legend). However in Poland the legend goes like that (in a nutshell): Lech (he was one of three brothers: Lech, Czech and Rus) follows the eagle and when the eagle brings him to his nest, Lech take it as a sign that he should settle there and creat a country. Why the Polish national symbol is white eagle on the red background? Because he wanted to see what is in the nest when the eagle aroused to fly and it was sunset time so the sky was red...
I must admit I like more Des Essientes' version :)
There are many legends in Poland. I suggest to create a new thread to not to annoy the mods ;)
Popular legends:
About Wanda who didn't want to marry a German
About Wars and Sawa (how the city Warsaw was established)
About the Wawel dragon and shoemaker Dratewka
About Bazyliszek
About Boruta devil
About nobleman Mr Twardowski who end up on the moon