Tuchola Forest Biosphere Reserve

The Tuchola Forest, also known as Tuchola Pinewoods, (literal translation of Polish: Bory Tucholskie; Kashubian: Tëchòlsczé Bòrë; German: Tuchler or Tucheler Heide) is a large forest near the town of Tuchola (Tucheln) in northern Poland, which lies between the Brda and Wda Rivers. It contains the Tuchola Forest National Park, which is at the core of the Tuchola Forest Biosphere Reserve, designated by UNESCO in 2010.

The area was formed during the last glacial age and is covered with low hills and more than 900 post-glacial lakes. With 3,200 km² of dense spruce and pine forest, the area is one of the biggest forests in Poland and Central Europe. Since 1996, part of the area has been designated as the Tuchola Forest National Park, covering 46.13 square kilometres (17.81 sq mi). Approximately 30% of the area is inhabited by the Kociewiacy people.

The largest towns in the area are Czersk and Tuchola.

During the German Empire era, Truppenübungsplatz Gruppe (now ) was a military exercise area in which medical research was conducted, leading to publication of the name in scientific reports of the early 20th century. During World War I, pacifist doctor Georg Friedrich Nicolai was banished from Berlin to the remote area which had to be ceded in 1919 to Poland as a result of the Treaty of Versailles (Polish Corridor).

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