I was at a loss before I noticed the community this was coming from.
Shit. That will wake someone up.
I was watching a Russian adventurer on youtube traveling through Siberia on foot and this is a real thing in Russia - the Road of Bones:. He kept finding skulls and human bones near the highway he was traveling, and stumbled across more than a few work and camps used to construct it:
"The road is treated as a memorial by some, as the bones of the estimated 250,000–1,000,000 imprisoned laborers who died while constructing it were allegedly laid beneath or around the road"