This is clearly visible from the road, though it is not marked at all.
That memorial is to the right of the road, about where the lumber truck is. The graves are up the track to the left. The entrance here is completely unmarked. I knew where they were because I spent quite some time scrutinizing this area on Google Maps back in Berlin.
There’s nothing on the path up and over the hill, until you see this.
Wikipedia explains the significance of Józefów. The German article is short, but points out the uniqueness.
