Puszcza Darżlubska

Puszcza Darżlubska (pronounced [puʂ'tʂa darʐlubska]) or Lasy Piaśnickie (English: Darżlubska Wilderness or Darżlubie / Piaśnica Forest), located in the northernmost part of Poland, is a Polish forests complex on the Baltic Sea, within the geographical region of Pobrzeże Kaszubskie; on the south-side bordering the Tricity Landscape Park (Trójmiejski Park Krajobrazowy) from which it is separated by the Reda river. Inside Darżlubie Forest there are two nature reserves (Polish protected areas). The wilderness is also the source of two rivers: Piaśnica and Gizdepka. The name of Puszcza Darżlubska comes from the nearby village of Darżlubie in the administrative district of Gmina Puck, north of Gdańsk.

Puszcza Darżlubska is the second largest site of mass killings of Polish civilians in Pomerania (after Stutthof) during World War II, with up to 16,000 victims murdered on the site. Polish migrant worker families residing in Germany pre-war were the largest group executed. Besides Poles and Kashubs, the victims included patients from mental health hospitals (including Germans), Czechs and Jews. The waves of Nazi German executions, known as the Mass murders in Piaśnica, of about 12,000–16,000 victims, were committed between the fall of 1939 and spring of 1940 near the town of Wielka Piaśnica.

With the total area of c.17,271 ha Puszcza Darżlubska includes two protected landscape areas called Darżlubskie Buki and Źródliska Czarnej Wody Nature Reserve. The flora of both is similar to that of the Tricity Landscape Park established in 1979. The dominant tree is European Beech (Fagus sylvatica) forming thickets with pine and other coniferous trees.