In a forest about seventy kilometres northeast of Bydgoszcz, the nazis murdered between november 1939 and january 1945 about 10,000 poles. The majority of the victims had been murdered as part of Aktion AB (Ausserordentliche Befriedungsaktion), which aimed to murder educated Poles whom the Nazis considered to be potential leaders of a Polish resistance movement. The victims came from Chelmno (not to be confused with the extermination camp with the same name), Grudziadz, Bydgoszcz, Starograd and from the mental hospital in Swieciu.

Current status: Monument (2012).

Location: 53°28'58.9"N 18°37'17.7"E

Get there: Car.

My comment:

The site is located about 1.5 kilometers from the main road onto a forest road in bad condition. But the place itself is located in a small basin and is well maintained and a number of monuments are established on the site. Right at the entrance to the memorial there is a seemingly meaningless little enclosure around a tree. But if you examine the tree a little closer, you can see rough nails in which the Nazis attached ropes that people were hanged in.

Follow up in books: Lukas, Richard C: Forgotten Holocaust: The Poles Under German Occupation 1939-1944 (2008).