The sky is seen through trees at Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 28, 2016. REUTERS/Kacper Pempel
Image used for illustrative purpose. The sun shines through trees in a protected area of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
Trees lie in water in a swampy area of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
Tree stumps are seen at Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
A tree stands in Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 28, 2016. REUTERS/Kacper Pempel
A woodpecker perches on a tree in a protected area of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
European bisons graze on the edge of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 28, 2016. REUTERS/Kacper Pempel
Trees are reflected in a river in Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
A swampy part of forest is seen in a protected area of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
A bough covered with moss is seen in a protected area of Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
A marked tree grows in Bialowieza forest, the last primeval forest in Europe, near Bialowieza village, Poland May 30, 2016. REUTERS/Kacper Pempel
Europe's last primeval forest
Occupying almost 580 square miles of woodland, Bialowieza is a UNESCO World Heritage site and Europe's last primeval forest - and it is under attack, from bark beetles eating its spruce trees.
