Sorry I dont know about that but I do know about the lakes created by activity in the Baltic Sea in Slowinki National Park. So it's unique that now there are more lakes. 
 There certainly rich in history and have undergone many governmental, military, and economic transitions. 
 That's good to know about Poland's economy. Can you tell me about the geography of Poland? 
 Hello, I am interested in learning about Poland's Economy? 
 Poland seems like a really cool place to visit.
There certainly rich in history and have undergone many governmental, military, and economic transitions.