In the late 70s, I was shown a scary place in the forest near the Chernobyl nuclear power plant. Under a huge tree in the shape of the letter "psi", a small wooden rectangular fence (5 m. by 10-12 m.) was fenced with a pit 50-70 cm deep. There were several bent metal fasteners on two large branches of the tree. Everything pointed to the fact that this was the place of execution and at the same time the burial of the victims. There were no monuments nearby and there was a highway very close by.
Interesting : Is this the same place?