Mat Schulz goes hunting for the endangered bison in a primeval corner of Poland. For most people, Poland is connected with images of factories, coalmines and shipyards. But between the industrial landscapes there are mountains, lakes and sea. Most surprisingly, on the border with Belarus, Poland also has mainland Europe's last primeval forest - 8000 years old and 1250 square kilometres in size. The Bialowieza Forest still exists because Polish and Lithuanian royalty used it for hunting from the 14th century. When, in the 19th century, the land became part of Russia, the tsar reserved it for the same purpose....