On July 12 and 13, 1941, Nazi killing units (Police battalion 316 and 322) killed about 4,000 Jewish men in a forest north of Bialystok called Pietrasze. The Jews were forced to undress and then stand next to pre-dug graves and shot. A total of 6500 – 7000 Jewish men were murdered in Bialystok region in the weeks after Germany invaded the Soviet Union, June 22, 1941 (Bialystok was then within the Soviet borders).

Current status: Monument (2015).

Location: 53° 10' 11" N 23° 09' 55" E

Get there: Car.

My comment:

From the main road the site is about 1500 meters into the forest and the last 1000 meters you have to walk because it is a closed road. The site can still be a bit tricky to find because the area consists of intersecting forest roads so it can be good to memorize which way you came from. The site itself consists of a memorial and eleven marked mass graves, all surrounded by a fence. When you wander the site you can feel how porous the ground is and easily dug. This was of course an advantage when the mass graves were dug and a contributing factor that the Nazis choosed the site for murder.

Follow up in books: Arad, Yitzhak: Holocaust in the Soviet union (2009).