In October and November, 1939, hundred Poles were murdered in a forest east of Klamry, about fourty kilometres northeast of Bydgoszcz. It was mainly educated Poles, journalists, teachers, police officers, officers, priests, etc., who were murdered. On the part of the Nazis, these were considered a threat to German supremacy and a germanization of Poland and must be eliminated. The murders were carried out by Nazi Einsatzkommandon and local units consisting of ethnic Germans, known as Selbstschutz.

Current status: Monument (2015).

Location: Memorial monument: 53°21'21.54"N 18°31'19.22"E Mass grave: 53°21'08.97"N 18°31'06.83"E

Get there: Car.

My comment:

There are two monuments that are close to each other. One is easy to find because it is located next to the road. The other is located about 600 meters into a forest road and can be a bit tricky to find.

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